• Reference Citation Analysis
  • v
  • v
  • Find an Article
Find an Article PDF (4689143)   Today's Articles (309)
For: Gutt CN, Encke J, Köninger J, Harnoss J, Weigand K, Kipfmüller K, Schunter O, Götze T, Golling MT, Menges M, Klar E, Feilhauer K, Zoller WG, Ridwelski K, Ackmann S, Baron A, Schön MR, Seitz HK, Daniel D, Stremmel W, Büchler MW. Acute Cholecystitis: Early Versus Delayed Cholecystectomy, A Multicenter Randomized Trial (ACDC Study, NCT00447304). Ann Surg 2013;258:385-93. [DOI: 10.1097/sla.0b013e3182a1599b] [Citation(s) in RCA: 310] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Number Cited by Other Article(s)
251
Beliaev AM, Booth M. C-reactive protein measurement is not associated with an improved management of acute cholecystitis: a plié for a change. J Surg Res 2015;198:93-8. [DOI: 10.1016/j.jss.2015.05.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/08/2015] [Accepted: 05/22/2015] [Indexed: 01/05/2023]
252
Coccolini F, Tranà C, Sartelli M, Catena F, Saverio SD, Manfredi R, Montori G, Ceresoli M, Falcone C, Ansaloni L. Laparoscopic management of intra-abdominal infections: Systematic review of the literature. World J Gastrointest Surg 2015;7:160-169. [PMID: 26328036 PMCID: PMC4550843 DOI: 10.4240/wjgs.v7.i8.160] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/24/2015] [Accepted: 07/08/2015] [Indexed: 02/06/2023]  Open
253
Wu XD, Tian X, Liu MM, Wu L, Zhao S, Zhao L. Meta-analysis comparing early versus delayed laparoscopic cholecystectomy for acute cholecystitis. Br J Surg 2015;102:1302-13. [PMID: 26265548 DOI: 10.1002/bjs.9886] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 01/14/2015] [Accepted: 05/27/2015] [Indexed: 01/03/2023]
254
Baron TH, Grimm IS, Swanstrom LL. Interventional Approaches to Gallbladder Disease. N Engl J Med 2015. [PMID: 26200981 DOI: 10.1056/nejmra1411372] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
255
Percutaneous aspiration of the gall bladder for the treatment of acute cholecystitis: a prospective study. Surg Endosc 2015. [DOI: 10.1007/s00464-015-4419-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
256
Katabathina VS, Zafar AM, Suri R. Clinical Presentation, Imaging, and Management of Acute Cholecystitis. Tech Vasc Interv Radiol 2015;18:256-65. [PMID: 26615166 DOI: 10.1053/j.tvir.2015.07.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
257
Chou CK, Lee KC, Chan CC, Perng CL, Chen CK, Fang WL, Lin HC. Early Percutaneous Cholecystostomy in Severe Acute Cholecystitis Reduces the Complication Rate and Duration of Hospital Stay. Medicine (Baltimore) 2015;94:e1096. [PMID: 26166097 PMCID: PMC4504525 DOI: 10.1097/md.0000000000001096] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]  Open
258
Operative delay to laparoscopic cholecystectomy. J Trauma Acute Care Surg 2015;79:15-21. [DOI: 10.1097/ta.0000000000000699] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
259
Shingu Y, Komatsu S, Norimizu S, Taguchi Y, Sakamoto E. Laparoscopic subtotal cholecystectomy for severe cholecystitis. Surg Endosc 2015;30:526-531. [DOI: 10.1007/s00464-015-4235-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 05/08/2015] [Indexed: 02/07/2023]
260
Perioperative outcomes of delayed laparoscopic cholecystectomy for acute calculous cholecystitis with and without percutaneous cholecystostomy. Surgery 2015;158:728-35. [PMID: 26094175 DOI: 10.1016/j.surg.2015.05.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 05/06/2015] [Accepted: 05/09/2015] [Indexed: 11/24/2022]
261
Early versus delayed same-admission laparoscopic cholecystectomy for acute cholecystitis in elderly patients with comorbidities. J Trauma Acute Care Surg 2015;78:801-7. [PMID: 25742252 DOI: 10.1097/ta.0000000000000577] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
262
Ambe PC, Kaptanis S, Papadakis M, Weber SA, Zirngibl H. Cholecystectomy vs. percutaneous cholecystostomy for the management of critically ill patients with acute cholecystitis: a protocol for a systematic review. Syst Rev 2015;4:77. [PMID: 26025467 PMCID: PMC4458028 DOI: 10.1186/s13643-015-0065-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 05/21/2015] [Indexed: 11/10/2022]  Open
263
Postoperative outcomes with cholecystectomy in lung transplant recipients. Surgery 2015;158:373-8. [PMID: 25999250 DOI: 10.1016/j.surg.2015.02.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 02/21/2015] [Accepted: 02/28/2015] [Indexed: 12/13/2022]
264
Koti RS, Davidson CJ, Davidson BR. Surgical management of acute cholecystitis. Langenbecks Arch Surg 2015;400:403-19. [PMID: 25971374 DOI: 10.1007/s00423-015-1306-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 12/13/2022]
265
Beliaev AM, Marshall RJ, Booth M. C-reactive protein has a better discriminative power than white cell count in the diagnosis of acute cholecystitis. J Surg Res 2015;198:66-72. [PMID: 26038247 DOI: 10.1016/j.jss.2015.05.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 03/30/2015] [Accepted: 05/01/2015] [Indexed: 12/21/2022]
266
Early Cholecystectomy Is Superior to Delayed Cholecystectomy for Acute Cholecystitis: a Meta-analysis. J Gastrointest Surg 2015;19:848-57. [PMID: 25749854 DOI: 10.1007/s11605-015-2747-x] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 01/07/2015] [Indexed: 01/31/2023]
267
Agresta F, Campanile FC, Vettoretto N, Silecchia G, Bergamini C, Maida P, Lombari P, Narilli P, Marchi D, Carrara A, Esposito MG, Fiume S, Miranda G, Barlera S, Davoli M. Laparoscopic cholecystectomy: consensus conference-based guidelines. Langenbecks Arch Surg 2015;400:429-53. [PMID: 25850631 DOI: 10.1007/s00423-015-1300-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/24/2015] [Indexed: 12/21/2022]
268
Butte JM, Hameed M, Ball CG. Hepato-pancreato-biliary emergencies for the acute care surgeon: etiology, diagnosis and treatment. World J Emerg Surg 2015;10:13. [PMID: 25767562 PMCID: PMC4357088 DOI: 10.1186/s13017-015-0004-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 02/02/2015] [Indexed: 12/19/2022]  Open
269
Sugrue M, Sahebally SM, Ansaloni L, Zielinski MD. Grading operative findings at laparoscopic cholecystectomy- a new scoring system. World J Emerg Surg 2015;10:14. [PMID: 25870652 PMCID: PMC4394404 DOI: 10.1186/s13017-015-0005-x] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 02/09/2015] [Indexed: 12/19/2022]  Open
270
Viste A, Jensen D, Angelsen JH, Hoem D. Percutaneous cholecystostomy in acute cholecystitis; a retrospective analysis of a large series of 104 patients. BMC Surg 2015;15:17. [PMID: 25872885 PMCID: PMC4357156 DOI: 10.1186/s12893-015-0002-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 02/05/2015] [Indexed: 01/07/2023]  Open
271
[Benefit assessment of operative interventions from the perspective of surgical research]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2015;58:248-55. [PMID: 25566844 DOI: 10.1007/s00103-014-2113-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
272
Peitzman AB, Watson GA, Marsh JW. Acute cholecystitis: When to operate and how to do it safely. J Trauma Acute Care Surg 2015;78:1-12. [PMID: 25539197 DOI: 10.1097/ta.0000000000000476] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
273
Gray KD, Nandakumar G. Surgical Management of Acute Cholecystitis. ACUTE CHOLECYSTITIS 2015:77-85. [DOI: 10.1007/978-3-319-14824-3_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2025]
274
Falor AE, Choy T, de Virgilio C. Postprandial RUQ Pain. Surgery 2015. [DOI: 10.1007/978-1-4939-1726-6_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
275
Ambe P, Weber SA, Christ H, Wassenberg D. Cholecystectomy for acute cholecystitis. How time-critical are the so called "golden 72 hours"? Or better "golden 24 hours" and "silver 25-72 hour"? A case control study. World J Emerg Surg 2014;9:60. [PMID: 25538792 PMCID: PMC4274710 DOI: 10.1186/1749-7922-9-60] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 12/12/2014] [Indexed: 01/31/2023]  Open
276
Cholecystectomy for acute cholecystitis. How time-critical are the so called "golden 72 hours"? Or better "golden 24 hours" and "silver 25-72 hour"? A case control study. World J Emerg Surg 2014. [PMID: 25538792 DOI: 10.1186/1749-7922-9-60393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]  Open
277
Robotic versus laparoscopic cholecystectomy inpatient analysis: does the end justify the means? J Gastrointest Surg 2014;18:2116-22. [PMID: 25319034 DOI: 10.1007/s11605-014-2673-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/02/2014] [Indexed: 01/31/2023]
278
Dziodzio T, Weiss S, Sucher R, Pratschke J, Biebl M. A 'critical view' on a classical pitfall in laparoscopic cholecystectomy! Int J Surg Case Rep 2014;5:1218-21. [PMID: 25437680 PMCID: PMC4275857 DOI: 10.1016/j.ijscr.2014.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 11/07/2014] [Indexed: 12/24/2022]  Open
279
Eachempati SR, Cocanour CS, Dultz LA, Phatak UR, Albarado R, Rob Todd S. Acute cholecystitis in the sick patient. Curr Probl Surg 2014;51:441-66. [PMID: 25497405 DOI: 10.1067/j.cpsurg.2014.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/30/2014] [Indexed: 12/24/2022]
280
Demehri FR, Alam HB. Evidence-Based Management of Common Gallstone-Related Emergencies. J Intensive Care Med 2014;31:3-13. [DOI: 10.1177/0885066614554192] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 06/23/2014] [Indexed: 12/15/2022]
281
Cholecystectomy in octogenarians: be careful. Updates Surg 2014;66:265-8. [PMID: 25266894 DOI: 10.1007/s13304-014-0267-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 09/20/2014] [Indexed: 12/30/2022]
282
Improving the outcome of acute cholecystitis: the non-standardized treatment must no longer be employed. Langenbecks Arch Surg 2014;399:1065-70. [DOI: 10.1007/s00423-014-1245-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 08/18/2014] [Indexed: 01/05/2023]
283
Acute Cholecystitis. Adv Surg 2014;48:155-64. [PMID: 25293613 DOI: 10.1016/j.yasu.2014.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
284
Creedon LR, Neophytou C, Leeder PC, Awan AK. Are we meeting the British Society of Gastroenterology guidelines for cholecystectomy post-gallstone pancreatitis? ANZ J Surg 2014;86:1024-1027. [PMID: 25155846 DOI: 10.1111/ans.12827] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2014] [Indexed: 01/05/2023]
285
Comparison of clinical safety and outcomes of early versus delayed laparoscopic cholecystectomy for acute cholecystitis: a meta-analysis. ScientificWorldJournal 2014;2014:274516. [PMID: 25133217 PMCID: PMC4123505 DOI: 10.1155/2014/274516] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 06/21/2014] [Accepted: 06/30/2014] [Indexed: 12/18/2022]  Open
286
Pieniowski E, Popowicz A, Lundell L, Gerber P, Gustafsson U, Sinabulya H, Sjödahl K, Tsekrekos A, Sandblom G. Early versus delayed surgery for acute cholecystitis as an applied treatment strategy when assessed in a population-based cohort. Dig Surg 2014;31:169-76. [PMID: 25034765 DOI: 10.1159/000363659] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 05/13/2014] [Indexed: 12/12/2022]
287
Early Cholecystectomy for Acute Cholecystitis: How Early Should It Be? Ann Surg 2014;262:e74. [PMID: 24979596 DOI: 10.1097/sla.0000000000000817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
288
An acute care surgery dilemma: emergent laparoscopic cholecystectomy in patients on aspirin therapy. Am J Surg 2014;209:689-94. [PMID: 25064416 DOI: 10.1016/j.amjsurg.2014.04.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 04/08/2014] [Accepted: 04/17/2014] [Indexed: 01/22/2023]
289
Slim K, Launay Savary MV. Ne « refroidissez » plus les cholécystites aiguës lithiasiques ! ANNALES FRANCAISES DE MEDECINE D URGENCE 2014. [DOI: 10.1007/s13341-014-0418-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
290
Reply to Letter: "Timing of Cholecystectomy in Acute Cholecystitis". Ann Surg 2014;262:e87. [PMID: 24670847 DOI: 10.1097/sla.0000000000000645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
291
Patient value is superior with early surgery for acute cholecystitis. Ann Surg 2014;259:16-7. [PMID: 24326747 DOI: 10.1097/sla.0000000000000428] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
292
Reply to Letter: "Concerns About Acute Cholecystitis: Early Versus Delayed Cholecystectomy--A Multicenter Randomized Trial". Ann Surg 2014;262:e63-4. [PMID: 24509199 DOI: 10.1097/sla.0000000000000553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
293
Gargya V, Smolarek S, Walsh TN. Concerns About Acute Cholecystitis: Early Versus Delayed Cholecystectomy--A Multicenter Randomized Trial. Ann Surg 2014;262:e63-4. [PMID: 24441795 DOI: 10.1097/sla.0000000000000554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
294
Scientific surgery. Br J Surg 2013. [DOI: 10.1002/bjs.9396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
295
Losvik OK. Tidlig eller sen operasjon ved kolecystitt? TIDSSKRIFT FOR DEN NORSKE LEGEFORENING 2013. [DOI: 10.4045/tidsskr.13.1201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]  Open
PrevPage 6 of 6 123456Next
© 2004-2025 Baishideng Publishing Group Inc. All rights reserved. 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA