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Orchard MR, Saracino A, Hooper J, Shabbir J. Ileorectal anastomosis in ulcerative colitis: what do surgeons and patients need to know? A systematic literature review. Ann R Coll Surg Engl 2024. [PMID: 38660816 DOI: 10.1308/rcsann.2024.0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Abstract
INTRODUCTION Ileal pouch-anal anastomosis (IPAA) is currently the gold standard for restoration of gastrointestinal continuity after colectomy for ulcerative colitis in the UK. However, with further experience of the risks relating to IPAA, the use of ileorectal anastomosis (IRA) is being revisited. Decisions regarding restorative surgery after colectomy are individual to every patient's circumstances, and this paper aims to provide a comprehensive review of the literature to guide a full discussion of the risks and benefits of IRA. METHODS A systematic literature review was conducted of papers published from 2000 onwards relating to IRA and ulcerative colitis, in accordance with the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) guidelines. The papers were reviewed by two independent surgeons for information it was felt that patients and surgeons would want to know about the operation (cancer risk, bowel function, sexual and urinary function, fecundity/fertility and postoperative complications). RESULTS Seventeen papers were identified for inclusion as they reported original data on one or more of the categories identified for discussion. The median ten-year cancer risk after IRA was 2.8% and the median failure rate at ten years was 21%. IRA was generally found to have lower postoperative complication rates and better bowel function than IPAA, with sexual function similar and fecundity not commented on in any paper. CONCLUSIONS For some patients, IRA can offer restorative surgery in the short or long term, with acceptable cancer risk, failure rate and postoperative complications, while avoiding the higher risks associated with IPAA.
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Affiliation(s)
- M R Orchard
- University Hospitals Bristol and Weston NHS Foundation Trust, UK
| | | | - J Hooper
- University Hospitals Bristol and Weston NHS Foundation Trust, UK
| | - J Shabbir
- University Hospitals Bristol and Weston NHS Foundation Trust, UK
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Boldovjakova D, El-Abbassy I, Alarcon I, El-Saify M, Chan JH, Harley M, Parnaby C, Watson A, Ramsay G. Management of the Rectal Stump after Subtotal Colectomy Operations for Inflammatory Bowel Disease in the Era of Immunologic Therapy: A Two-Centre Cohort Study. Dig Dis 2023; 41:872-878. [PMID: 37690444 DOI: 10.1159/000533267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 07/25/2023] [Indexed: 09/12/2023]
Abstract
INTRODUCTION Inflammatory bowel disease (IBD) often requires surgical resection, such as subtotal colectomy operations to alleviate symptoms. However, IBD also has an inherently increased risk of colorectal dysplasia and cancer. Despite the well-accepted surveillance guidelines for IBD patients with an intact colon, contemporaneous decision-making models on rectal stump surveillance is sparse. This study looks at the fate of rectal stumps in IBD patients following subtotal colectomy. METHODS This is a two-centre retrospective observational cohort study. Patients were identified from NHS Grampian and NHS Highland surgical IBD databases. Patients that had subtotal colectomy between January 01, 2010 and December 31, 2017 were included with the follow-up end date on April 1, 2021. Socio-demographics, diagnosis, medical and surgical management data were collected from electronic records. RESULTS Of 250 patients who had subtotal colectomy procedures, only one developed a cancer in their rectal stump (0.4%) over a median follow-up of 80 months. A higher than expected 72% of patients had ongoing symptoms from their rectal stumps. Surveillance was varied and inconsistent. However, no surveillance, flexible sigmoidoscopy, or MRI identified dysplastic or neoplastic disease. CONCLUSION Based on our results, we estimate that the prevalence of rectal cancer is lower than previously reported. Surveillance strategy of rectal stump varied as no current guidelines exist and hence is an important area for future study. Given the relatively low frequency of rectal cancer in these patients, and the low level of evidence available in this field, we would propose a registry-based approach to answering this important clinical question.
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Affiliation(s)
| | - Islam El-Abbassy
- General Surgery Department, Faculty of Medicine, Ain Shams University, Abbassia, Cairo, Egypt
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - Inari Alarcon
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - Mamoun El-Saify
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - Juen Hao Chan
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - Morag Harley
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - Craig Parnaby
- Department of Surgery, Aberdeen Royal Infirmary, Aberdeen, UK
| | - Angus Watson
- Department of Surgery, Aberdeen Royal Infirmary, Aberdeen, UK
- Department of General Surgery, Raigmore Hospital, Inverness, UK
| | - George Ramsay
- Department of Surgery, Aberdeen Royal Infirmary, Aberdeen, UK
- Institute of Medical Sciences, University of Aberdeen, King's College, Aberdeen, UK
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Abstract
BACKGROUND Patients undergoing total colectomy for IBD may develop cancer in the rectal remnant, but the association is poorly understood. OBJECTIVES This study aimed to examine the risk and prognosis of rectal cancer after total colectomy for IBD. DESIGN This is a nationwide population-based study. SETTING Treatment of the patients took place in Denmark from 1977 to 2013. PATIENTS Patients with IBD undergoing total colectomy were included. MAIN OUTCOME MEASURES We examined the incidence of rectal cancer among patients with IBD and total colectomy and compared cancer stage to that of other patients with rectal cancer in Denmark. We used Kaplan-Meier methodology to estimate survival and Cox regression to estimate adjusted mortality rate ratios following a rectal cancer diagnosis, comparing patients with and without IBD and a rectal remnant. RESULTS We identified 4703 patients with IBD (1026 Crohn's disease; 3677 ulcerative colitis) who underwent total colectomy with a rectal remnant. During 29,725 years of follow-up, 30 rectal cancers were observed, compared with 8 rectal cancers expected (standardized incidence ratio = 3.6 (95% CI, 2.4-5.1)). Cancer stage distributions were similar. Risk of rectal cancer 35 years after total colectomy was 1.9% (95% CI, 1.1%-2.9%). Five years after rectal cancer diagnosis, survival was 28% (95% CI, 12%-47%) and 38% (95% CI, 37%-38%) for patients with and without IBD and a rectal remnant. The adjusted mortality rate ratio 1 to 5 years after a rectal cancer diagnosis was 2.5 (95% CI, 1.6-3.9). Median time from last recorded nondiagnostic proctoscopy to rectal cancer diagnosis for patients with IBD and total colectomy was 1.1 years. LIMITATIONS This study was limited by the few outcomes and the use of administrative and not clinical data. CONCLUSION Long-term risk of rectal cancer following total colectomy for IBD was low. Survival following a diagnosis of rectal cancer was poorer for patients with IBD and total colectomy than for patients who had rectal cancer without IBD and total colectomy. Endoscopic surveillance, as it appeared to be practiced in this cohort, may be inadequate. See Video Abstract at http://links.lww.com/DCR/B497. RIESGO DE CÁNCER DE RECTO Y SUPERVIVENCIA DESPUÉS DE UNA COLECTOMÍA TOTAL POR ENFERMEDAD INFLAMATORIA INTESTINAL: UN ESTUDIO POBLACIONAL: Los pacientes sometidos a colectomía total por enfermedad inflamatoria intestinal (EII) pueden desarrollar cáncer en el remanente rectal, pero la asociación es poco conocida.Examinar el riesgo y el pronóstico del cáncer de recto después de una colectomía total para la EII.Estudio poblacional a nivel nacional.Dinamarca 1977-2013.Pacientes con EII sometidos a colectomía total.Examinamos la incidencia de cáncer de recto entre pacientes con EII y colectomía total y comparamos el estadio del cáncer con el de otros pacientes con cáncer de recto en Dinamarca. Utilizamos la metodología de Kaplan-Meier para estimar la supervivencia y la regresión de Cox para estimar las tasas de mortalidad ajustadas (aMRR) después de un diagnóstico de cáncer de recto, comparando pacientes con y sin EII y un remanente rectal.Identificamos 4.703 pacientes con EII (1.026 enfermedad de Crohn; 3.677 colitis ulcerosa) que se sometieron a colectomía total con remanente rectal. Durante 29,725 años de seguimiento, se observaron 30 cánceres de recto, en comparación con los 8 esperados [razón de incidencia estandarizada (SIR) = 3.6, (intervalo de confianza (IC) del 95%: 2.4-5.1)]. Las distribuciones de las etapas del cáncer fueron similares. El riesgo de cáncer de recto 35 años después de la colectomía total fue del 1,9% (IC del 95%: 1,1% -2,9%). Cinco años después del diagnóstico de cáncer de recto, la supervivencia fue del 28% (IC del 95%: 12% -47%) y del 38% (IC del 95%: 37% -38%) para los pacientes con y sin EII y un remanente rectal, respectivamente. La aMRR 1-5 años después de un diagnóstico de cáncer de recto fue de 2,5 (IC del 95%: 1,6-3,9). La mediana de tiempo desde la última proctoscopia no diagnóstica registrada hasta el diagnóstico de cáncer de recto en pacientes con EII y colectomía total fue de 1,1 años.Pocos resultados, uso de datos administrativos y no clínicos.El riesgo a largo plazo de cáncer de recto después de una colectomía total para la EII fue bajo. La supervivencia después de un diagnóstico de cáncer de recto fue más pobre para los pacientes con EII y colectomía total que para los pacientes con cáncer de recto sin EII y colectomía total. La vigilancia endoscópica, como parecía practicarse en esta cohorte, puede ser inadecuada. Consulte Video Resumen en http://links.lww.com/DCR/B497. (Traducción-Dr. Adrian Ortega).
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Hennessy O, Egan L, Joyce M. Subtotal colectomy in ulcerative colitis—long term considerations for the rectal stump. World J Gastrointest Surg 2021; 13:198-209. [PMID: 33643539 PMCID: PMC7898189 DOI: 10.4240/wjgs.v13.i2.198] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/23/2020] [Accepted: 01/21/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The initial operation of choice in many patients presenting as an emergency with ulcerative colitis is a subtotal colectomy with end ileostomy. A percentage of patients do not proceed to completion proctectomy with ileal pouch anal anastomosis.
AIM To review the existing literature in relation to the significant long-term complic-ations associated with the rectal stump, to provide an overview of options for the surgical management of remnant rectum and anal canal and to form a consolidated guideline on endoscopic screening recommendations in this cohort.
METHODS A systematic review was carried out in accordance with PRISMA guidelines for papers containing recommendations for endoscopy surveillance in rectal remnants in ulcerative colitis. A secondary narrative review was carried out exploring the medical and surgical management options for the retained rectum.
RESULTS For rectal stump surveillance guidelines, 20% recommended an interval of 6 mo to a year, 50% recommended yearly surveillance 10% recommended 2 yearly surveillance and the remaining 30% recommended risk stratification of patients and different screening intervals based on this. All studies agreed surveillance should be carried out via endoscopy and biopsy. Increased vigilance is needed in endoscopy in these patients. Literature review revealed a number of options for surgical management of the remnant rectum.
CONCLUSION The retained rectal stump needs to be surveyed endoscopically according to risk stratification. Great care must be taken to avoid rectal perforation and pelvic sepsis at time of endoscopy. If completion proctectomy is indicated the authors favour removal of the anal canal using an intersphincteric dissection technique.
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Affiliation(s)
- Orla Hennessy
- Department of Colorectal Surgery, Galway University Hospital, Galway H91RR2N, Ireland
| | - Laurence Egan
- Department of Gastroenterology, Galway University Hospital, Galway H91RR2N, Ireland
| | - Myles Joyce
- Department of Gastroenterology, Galway University Hospital, Galway H91RR2N, Ireland
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Murphy B, Kavanagh DO, Winter DC. Modern surgery for ulcerative colitis. Updates Surg 2020; 72:325-333. [DOI: 10.1007/s13304-020-00719-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 02/04/2020] [Indexed: 12/12/2022]
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Abdalla M, Norblad R, Olsson M, Landerholm K, Andersson P, Söderholm JD, Andersson R, Myrelid P. Anorectal Function After Ileo-Rectal Anastomosis Is Better than Pelvic Pouch in Selected Ulcerative Colitis Patients. Dig Dis Sci 2020; 65:250-259. [PMID: 31372911 PMCID: PMC6943403 DOI: 10.1007/s10620-019-05757-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 07/20/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND With a lifelong perspective, 12% of ulcerative colitis patients will need a colectomy. Further reconstruction via ileo-rectal anastomosis or pouch can be affected by patients' perspective of their quality of life after surgery. AIM To assess the function and quality of life after restorative procedures with either ileo-rectal anastomosis or ileal pouch-anal anastomosis in relation to the inflammatory activity on endoscopy and in biopsies. METHOD A total of 143 UC patients operated with subtotal colectomy and ileo-rectal anastomosis or pouches between 1992 and 2006 at Linköping University Hospital were invited to participate. Those who completed the validated questionnaires (Öresland score, SF-36, Short Health Scale) were offered an endoscopic evaluation including multiple biopsies. Associations between anorectal function and quality of life with type of restorative procedure and severity of endoscopic and histopathologic grading of inflammation were evaluated. RESULTS Some 77 (53.9%) eligible patients completed questionnaires, of these 68 (88.3%) underwent endoscopic evaluation after a median follow-up of 12.5 (range 3.5-19.4) years after restorative procedure. Patients with ileo-rectal anastomosis reported better overall Öresland score: median = 3 (IQR 2-5) for ileo-rectal anastomosis (n = 38) and 10 (IQR 5-15) for pouch patients (n = 39) (p < 0.001). Anorectal function (Öresland score) and endoscopic findings (Baron-Ginsberg score) were positively correlated in pouch patients (tau: 0.28, p = 0.006). CONCLUSION Patients operated with ileo-rectal anastomosis reported better continence compared to pouches. Minor differences were noted regarding the quality of life. Ileo-rectal anastomosis is a valid option for properly selected ulcerative colitis patients if strict postoperative endoscopic surveillance is carried out.
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Affiliation(s)
- Maie Abdalla
- grid.5640.70000 0001 2162 9922Department of Clinical and Experimental Medicine, Linköping University, 58183 Linköping, Sweden ,grid.33003.330000 0000 9889 5690Department of General Surgery, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Rickard Norblad
- grid.5640.70000 0001 2162 9922Department of Surgery, Linköping University Hospital and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Malin Olsson
- grid.5640.70000 0001 2162 9922Department of Surgery, Linköping University Hospital and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Kalle Landerholm
- grid.5640.70000 0001 2162 9922Department of Surgery, Ryhov County Hospital, Jönköping, and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Peter Andersson
- grid.5640.70000 0001 2162 9922Department of Surgery and Department of Clinical and Experimental medicine, Linköping University, Nörrköping, Sweden ,grid.411384.b0000 0000 9309 6304International Medical Program, Center for Teaching and Research in Disaster Medicine and Traumatology, University Hospital, Linköping, Sweden
| | - Johan D. Söderholm
- grid.5640.70000 0001 2162 9922Department of Surgery, Linköping University Hospital and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Roland Andersson
- grid.5640.70000 0001 2162 9922Department of Surgery, Ryhov County Hospital, Jönköping, and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Pär Myrelid
- grid.5640.70000 0001 2162 9922Department of Surgery, Linköping University Hospital and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
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Ansell J, Grass F, Merchea A. Surgical Management of Dysplasia and Cancer in Inflammatory Bowel Disease. Surg Clin North Am 2019; 99:1111-1121. [PMID: 31676051 DOI: 10.1016/j.suc.2019.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Patients with inflammatory bowel disease are at an increased risk of cancer secondary to long-standing intestinal inflammation. Surgical options must take into account the significant risk of synchronous disease at other colonic sites. Ileal pouch anal anastomosis is a viable option for patients with ulcerative colitis, but this should be restricted to early cancers that are unlikely to require preoperative or postoperative radiation treatment.
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Affiliation(s)
- James Ansell
- Division of Colon and Rectal Surgery, Mayo Clinic, 200 First Street Southwest, Rochester, MN 55905, USA
| | - Fabian Grass
- Division of Colon and Rectal Surgery, Mayo Clinic, 200 First Street Southwest, Rochester, MN 55905, USA
| | - Amit Merchea
- Division of Colon and Rectal Surgery, Mayo Clinic, 4500 San Pablo Road South, Jacksonville, FL 32224, USA.
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Landerholm K, Wood C, Bloemendaal A, Buchs N, George B, Guy R. The rectal remnant after total colectomy for colitis - intra-operative,post-operative and longer-term considerations. Scand J Gastroenterol 2018; 53:1443-1452. [PMID: 30451043 DOI: 10.1080/00365521.2018.1529195] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVES Acute severe colitis requires surgery in around 30% of the cases. Total colectomy with ileostomy is the standard procedure with distinct advantages to a laparoscopic approach. Less agreement exists regarding the formation or configuration of the retained rectal stump and its short-term and long-term management. In this review, aspects of management of the rectal remnant, including perioperative considerations, potential complications, medical treatment, surveillance and implications for proctectomy and reconstructive surgery are explored. METHODS A thorough literature review exploring the PubMed and EMBASE databases was undertaken to clarify the evidence base surrounding areas of controversy in the surgical approach to acute severe colitis. In particular, focus was given to evidence surrounding management of the rectal remnant. RESULTS There is a paucity of high quality evidence for optimal management of the rectal stump following colectomy, and randomised trials are lacking. Establishment of laparoscopic colectomy has been associated with distinct advantages as well as the emergence of unique considerations, including those specific to rectal remnant management. CONCLUSIONS Early surgical involvement and a multidisciplinary approach to the management of acute severe colitis are advocated. Laparoscopic subtotal colectomy and ileostomy should be the operation of choice, with division of the rectum at the pelvic brim leaving a closed intraperitoneal remnant. If the rectum is severely inflamed, a mucus fistula may be useful, and an indwelling rectal catheter is probably advantageous to reduce the complications associated with stump dehiscence. Patients electing not to proceed to proctectomy should undergo surveillance for dysplasia of the rectum.
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Affiliation(s)
- Kalle Landerholm
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
| | - Christopher Wood
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
| | - Alexander Bloemendaal
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
| | - Nicolas Buchs
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
| | - Bruce George
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
| | - Richard Guy
- a Department of Colorectal Surgery , Oxford University Hospital NHS Foundation Trust , Oxford , UK
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Reber JD, Barlow JM, Lightner AL, Sheedy SP, Bruining DH, Menias CO, Fletcher JG. J Pouch: Imaging Findings, Surgical Variations, Natural History, and Common Complications. Radiographics 2018; 38:1073-1088. [DOI: 10.1148/rg.2018170113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Joshua D. Reber
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - John M. Barlow
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - Amy L. Lightner
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - Shannon P. Sheedy
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - David H. Bruining
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - Christine O. Menias
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
| | - Joel G. Fletcher
- From the Departments of Radiology (J.D.R., J.M.B., S.P.S., J.G.F.), Colorectal Surgery (A.L.L.), and Gastroenterology (D.H.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (C.O.M.)
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Bohl JL, Sobba K. Indications and Options for Surgery in Ulcerative Colitis. Surg Clin North Am 2015; 95:1211-32, vi. [DOI: 10.1016/j.suc.2015.07.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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