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Bureš J, Radochová V, Květina J, Kohoutová D, Vališ M, Rejchrt S, Žďárová Karasová J, Soukup O, Suchánek Š, Zavoral M. Wireless Monitoring of Gastrointestinal Transit Time, Intra-luminal pH, Pressure and Temperature in Experimental Pigs: A Pilot Study. ACTA MEDICA (HRADEC KRALOVE) 2023; 66:11-18. [PMID: 37384804 DOI: 10.14712/18059694.2023.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
BACKGROUND There is no single gold standard for investigation of gastrointestinal motility function. Wireless motility monitoring involves a novel concept which provides a complex information on gastrointestinal function (gastrointestinal transit time, intra-luminal pH, pressure and temperature). Gastrointestinal motility functions of experimental pigs are very similar to those of humans. That is why porcine studies have already provided suitable experimental models for several preclinical projects. AIMS The aim of our study was to adopt methods of non-invasive wireless monitoring of gastrointestinal functions in experimental pigs. METHODS Five experimental adult female pigs were enrolled into the study. Wireless motility capsules were delivered into the porcine stomach endoscopically. Gastrointestinal transit and intra-luminal conditions were recorded for five days. RESULTS Records of animals provided good (3 pigs) or very good quality files (2 pigs). 31150 variables were evaluated. Mean time of the presence of capsules in the stomach was 926 ± 295 min, transfer of a capsule from the stomach into the duodenum lasted 5-34 min. Mean small intestinal transit time was 251 ± 43 min. Food intake was associated with an increase of gastric luminal temperature and a decrease of intra-gastric pressure. The highest intra-luminal pH was present in the ileum. The highest temperature and the lowest intra-luminal pressure were found in the colon. All data displayed a substantial inter-individual variability. CONCLUSIONS This pilot study has proven that a long-term function monitoring of the gastrointestinal tract by means of wireless motility capsules in experimental pigs is feasible. However, both ketamine-based induction of general anaesthesia as well as long-lasting general anaesthesia (> 6 hours) should be avoided to prevent retention of a capsule in the porcine stomach.
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Affiliation(s)
- Jan Bureš
- Biomedical Research Centre, University Hospital Hradec Králové, Czech Republic.
- Department of Medicine, Charles University, First Faculty of Medicine, Praha and Military University Hospital Praha, Czech Republic.
- Institute of Gastrointestinal Oncology, Military University Hospital Praha, Czech Republic.
| | - Věra Radochová
- Animal Laboratory, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Jaroslav Květina
- Biomedical Research Centre, University Hospital Hradec Králové, Czech Republic
| | - Darina Kohoutová
- Biomedical Research Centre, University Hospital Hradec Králové, Czech Republic
- The Royal Marsden Hospital NHS Foundation Trust, London, United Kingdom
| | - Martin Vališ
- Department of Neurology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Stanislav Rejchrt
- 2nd Department of Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové and University Hospital Hradec Králové, Czech Republic
| | - Jana Žďárová Karasová
- Department of Toxicology and Military Pharmacy, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Ondřej Soukup
- Biomedical Research Centre, University Hospital Hradec Králové, Czech Republic
| | - Štěpán Suchánek
- Department of Medicine, Charles University, First Faculty of Medicine, Praha and Military University Hospital Praha, Czech Republic
- Institute of Gastrointestinal Oncology, Military University Hospital Praha, Czech Republic
| | - Miroslav Zavoral
- Department of Medicine, Charles University, First Faculty of Medicine, Praha and Military University Hospital Praha, Czech Republic
- Institute of Gastrointestinal Oncology, Military University Hospital Praha, Czech Republic
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Zhao Z, Xu S, Zhang W, Wu D, Yang G. Probiotic Escherichia coli NISSLE 1917 for inflammatory bowel disease applications. Food Funct 2022; 13:5914-5924. [PMID: 35583304 DOI: 10.1039/d2fo00226d] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Escherichia coli NISSLE 1917 (EcN) is a Gram-negative strain with many prominent probiotic properties in the treatment of intestinal diseases such as diarrhea and inflammatory bowel disease (IBD), in particular ulcerative colitis. EcN not only exhibits antagonistic effects on a variety of intestinal pathogenic bacteria, but also regulates the secretion of immune factors in vivo and enhances the ability of host immunity. In this review, the mechanisms of EcN in the remission of inflammatory bowel disease are proposed and recent advances on the functionalized EcN are compiled to provide novel therapeutic strategies for the prevention and treatment of IBD.
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Affiliation(s)
- Zejing Zhao
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Shumin Xu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Wangyang Zhang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Danjun Wu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Gensheng Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
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Nagy K, Fébel H, Bazar G, Grosz G, Gáspár R, Ferenc Szűcs K, Tóth T. Non-invasive smooth muscle electromyography (SMEMG) as a novel monitoring technology of the gastrointestinal tract of awake, free-moving pigs-A pilot study. PLoS One 2021; 16:e0257311. [PMID: 34516588 PMCID: PMC8437306 DOI: 10.1371/journal.pone.0257311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 08/27/2021] [Indexed: 11/19/2022] Open
Abstract
There are several mathematical models and measurements to determine the efficiency of the digestibility of different feedstuffs. However, there is lack of information regarding the direct methods or measurement techniques used to analyse the physical response of the different parts of the gastrointestinal tract (GIT) of growing pigs to different diets. Smooth muscle electromyography (SMEMG) is a non-invasive method for the measurement of gastrointestinal myoelectrical activity. In the present study, SMEMG methodology has been adapted from laboratory rats to pigs, and the effects of feedstuffs with control (CTR) or experimentally increased (EXP) amounts of fibre were investigated on gastrointestinal tract motility. Nine barrow pigs ((Danish Landrace × Danish Yorkshire) × Danish Duroc) were used (30 ± 3 kg), and their CTR and EXP feedstuffs contained 29 and 49 g/kg crude fibre (CF), respectively. Myoelectric activities of the stomach, ileum and caecum were detected in the awake pigs by a pair of electrodes. The recorded myoelectric signals were analysed with fast Fourier transformation (FFT), and the spectra were expressed in GIT section-specific cycles per minutes (cpm) values and the maximum power spectrum density (PsDmax). A significant increase (P < 0.001) was observed in the value of the PsDmax of the small intestine (20–25 cpm) as a consequence of the EXP diet. The PsDmax values of the stomach (3–5 cpm) and large intestine (1–3 cpm) did not show any significant change in pigs fed the EXP diet. As a direct and non-invasive method, SMEMG is suitable for the rapid evaluation of the effects of diets with different fibre contents on the GIT of non-anaesthetised, free-moving pigs.
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Affiliation(s)
- Katalin Nagy
- Institute of Animal Physiology and Nutrition, Hungarian University of Agricultural and Life Sciences, Kaposvár, Hungary
| | - Hedvig Fébel
- Institute of Animal Physiology and Nutrition, Hungarian University of Agricultural and Life Sciences, Herceghalom, Hungary
| | - George Bazar
- Institute of Animal Physiology and Nutrition, Hungarian University of Agricultural and Life Sciences, Kaposvár, Hungary
- ADEXGO Kft., Balatonfüred, Hungary
- * E-mail:
| | | | - Róbert Gáspár
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Kálmán Ferenc Szűcs
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Tamás Tóth
- Institute of Animal Physiology and Nutrition, Hungarian University of Agricultural and Life Sciences, Kaposvár, Hungary
- ADEXGO Kft., Balatonfüred, Hungary
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Bureš J, Kohoutová D, Květina J, Radochová V, Pavlík M, Tichý A, Rejchrt S, Kopáčová M, Douda T, Vysloužil D, Pejchal J. The Effect of Lactobacillus casei on Experimental Porcine Inflammatory Bowel Disease Induced by Dextran Sodium Sulphate. ACTA MEDICA (HRADEC KRÁLOVÉ) 2021; 64:85-90. [PMID: 34331427 DOI: 10.14712/18059694.2021.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Gastrointestinal injury caused by dextran sodium sulphate (DSS) is a reliable porcine experimental model of inflammatory bowel disease (IBD). The purpose of this study was to evaluate the effect of probiotic Lactobacillus casei DN 114001 (LC) on DSS-induced experimental IBD. RESULTS Eighteen female pigs (Sus scrofa f. domestica, weight 33-36 kg, age 4-5 months) were divided into 3 groups (6 animals per group): controls with no treatment, DSS, and DSS + LC. LC was administered to overnight fasting animals in a dietary bolus in the morning on days 1-7 (4.5 × 1010 live bacteria/day). DSS was applied simultaneously on days 3-7 (0.25 g/kg/day). On day 8, the pigs were sacrificed. Histopathological score and length of crypts/glands (stomach, jejunum, ileum, transverse colon), length and width of villi (jejunum, ileum), and mitotic and apoptotic indices (jejunum, ileum, transverse colon) were assessed. DSS increased the length of glands in the stomach, length of crypts and villi in the jejunum and ileum, and the histopathological score of gastrointestinal damage, length of crypts and mitotic activity in the transverse colon. Other changes did not achieve any statistical significance. Administration of LC reduced the length of villi in the jejunum and ileum to control levels and decreased the length of crypts in the jejunum. CONCLUSIONS Treatment with a probiotic strain of LC significantly accelerated regeneration of the small intestine in a DSS-induced experimental porcine model of IBD.
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Affiliation(s)
- Jan Bureš
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic.
| | - Darina Kohoutová
- The Royal Marsden NHS Foundation Trust, London, United Kingdom.,2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic
| | - Jaroslav Květina
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic
| | - Věra Radochová
- Animal Laboratory, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Michal Pavlík
- Animal Laboratory, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Aleš Tichý
- Department of Radiobiology, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Stanislav Rejchrt
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic
| | - Marcela Kopáčová
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic
| | - Tomáš Douda
- 2nd Department of Internal Medicine - Gastroenterology, Charles University, Faculty of Medicine in Hradec Králové, University Hospital, Hradec Králové, Czech Republic
| | - David Vysloužil
- Department of Toxicology and Military Pharmacy, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
| | - Jaroslav Pejchal
- Department of Toxicology and Military Pharmacy, University of Defence, Faculty of Military Health Sciences, Hradec Králové, Czech Republic
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Bures J, Kvetina J, Radochova V, Tacheci I, Peterova E, Herman D, Dolezal R, Kopacova M, Rejchrt S, Douda T, Sestak V, Douda L, Karasova JZ. The pharmacokinetic parameters and the effect of a single and repeated doses of memantine on gastric myoelectric activity in experimental pigs. PLoS One 2020; 15:e0227781. [PMID: 31978146 PMCID: PMC6980640 DOI: 10.1371/journal.pone.0227781] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 12/28/2019] [Indexed: 12/31/2022] Open
Abstract
Background Memantine, currently available for the treatment of Alzheimer's disease, is an uncompetitive antagonist of the N-methyl-D-aspartate type of glutamate receptors. Under normal physiologic conditions, these unstimulated receptor ion channels are blocked by magnesium ions, which are displaced after agonist-induced depolarization. In humans, memantine administration is associated with different gastrointestinal dysmotility side effects (vomiting, diarrhoea, constipation, motor-mediated abdominal pain), thus limiting its clinical use. Mechanism of these motility disorders has not been clarified yet. Pigs can be used in various preclinical experiments due to their relatively very similar gastrointestinal functions compared to humans. The aim of this study was to evaluate the impact of a single and repeated doses of memantine on porcine gastric myoelectric activity evaluated by means of electrogastrography (EGG). Methods Six adult female experimental pigs (Sus scrofa f. domestica, mean weight 41.7±5.0 kg) entered the study for two times. The first EGG was recorded after a single intragastric dose of memantine (20 mg). In the second part, EGG was accomplished after 7-day intragastric administration (20 mg per day). All EGG recordings were performed under general anaesthesia. Basal (15 minutes) and study recordings (120 minutes) were accomplished using an EGG stand (MMS, Enschede, the Netherlands). Running spectral analysis based on Fourier transform was used. Results were expressed as dominant frequency of gastric slow waves (DF) and power analysis (areas of amplitudes). Results Single dose of memantine significantly increased DF, from basic values (1.65±1.05 cycles per min.) to 2.86 cpm after 30 min. (p = 0.008), lasting till 75 min. (p = 0.014). Basal power (median 452; inter-quartile range 280–1312 μV^2) raised after 15 min. (median 827; IQR 224–2769; p = 0.386; NS), lasting next 30 min. Repetitively administrated memantine caused important gastric arrhythmia. Basal DF after single and repeated administration was not different, however, a DF increase in the second part was more prominent (up to 3.18±2.16 after 15 and 30 min., p<0.001). In comparison with a single dose, basal power was significantly higher after repetitively administrated memantine (median 3940; IQR 695–15023 μV^2; p<0.001). Next dose of 20 mg memantine in the second part induced a prominent drop of power after 15 min. (median 541; IQR 328–2280 μV^2; p<0.001), lasting till 120 min. (p<0.001). Conclusions Both single and repeated doses of memantine increased DF. Severe gastric arrhythmia and long-lasting low power after repeated administration might explain possible gastric dysmotility side effects in the chronic use of memantine.
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Affiliation(s)
- Jan Bures
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
- * E-mail:
| | - Jaroslav Kvetina
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Vera Radochova
- Animal Laboratory, University of Defence, Faculty of Military Health Sciences, Hradec Kralove, Czech Republic
| | - Ilja Tacheci
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Eva Peterova
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - David Herman
- Department of Toxicology and Military Pharmacy, University of Defence, Faculty of Military Health Sciences, Hradec Kralove, Czech Republic
- Centre of Biomedical Research, University Hospital, Hradec Kralove, Czech Republic
| | - Rafael Dolezal
- Centre of Biomedical Research, University Hospital, Hradec Kralove, Czech Republic
| | - Marcela Kopacova
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Stanislav Rejchrt
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Tomas Douda
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Vit Sestak
- Institute of Clinical Biochemistry and Diagnostics, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Ladislav Douda
- 2nd Department of Internal Medicine—Gastroenterology, Charles University, Faculty of Medicine in Hradec Kralove and University Hospital, Hradec Kralove, Czech Republic
| | - Jana Zdarova Karasova
- Department of Toxicology and Military Pharmacy, University of Defence, Faculty of Military Health Sciences, Hradec Kralove, Czech Republic
- Centre of Biomedical Research, University Hospital, Hradec Kralove, Czech Republic
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Wassenaar TM. Insights from 100 Years of Research with Probiotic E. Coli. Eur J Microbiol Immunol (Bp) 2016; 6:147-161. [PMID: 27766164 PMCID: PMC5063008 DOI: 10.1556/1886.2016.00029] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 08/24/2016] [Indexed: 01/03/2023] Open
Abstract
A century ago, Alfred Nissle discovered that intentional intake of particular strains of Escherichia coli could treat patients suffering from infectious diseases. Since then, one of these strains became the most frequently used probiotic E. coli in research and was applied to a variety of human conditions. Here, properties of that E. coli Nissle 1917 strain are compared with other commercially available E. coli probiotic strains, with emphasis on their human applications. A literature search formed the basis of a summary of research findings reported for the probiotics Mutaflor, Symbioflor 2, and Colinfant. The closest relatives of the strains in these products are presented, and their genetic content, including the presence of virulence, genes is discussed. A similarity to pathogenic strains causing urinary tract infections is noticeable. Historic trends in research of probiotics treatment for particular human conditions are identified. The future of probiotic E. coli may lay in what Alfred Nissle originally discovered: to treat gastrointestinal infections, which nowadays are often caused by antibiotic-resistant pathogens.
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Affiliation(s)
- Trudy M. Wassenaar
- Molecular Microbiology and Genomics Consultants, Tannenstrasse 7, 55576 Zotzenheim, Germany
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Tachecí I, Květina J, Kuneš M, Pavlík M, Kopáčová M, Černý V, Rejchrt S, Edakkanambeth Varayil J, Bureš J. The effect of general anaesthesia on gastric myoelectric activity in experimental pigs. BMC Gastroenterol 2013; 13:48. [PMID: 23496859 PMCID: PMC3607881 DOI: 10.1186/1471-230x-13-48] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 02/26/2013] [Indexed: 11/10/2022] Open
Abstract
Background Surface electrogastrography (EGG) is a non-invasive method for clinical assessment of gastric myoelectrical activity. Different forms of general anaesthesia might have various effects on porcine EGG. The aim of this study was to evaluate the impact of different anaesthetic agents on EGG in experimental pigs. Methods Four 15-minute EGG intervals were recorded and analysed. A baseline EGG recording was started 20 minutes after intramuscular injection of ketamine and azaperone (periods A and B). Four different regimens of general anaesthesia followed immediately after the baseline EGG (5 pigs in each experimental group): thiopental, isoflurane, nitrous oxide and isoflurane plus nitrous oxide. EGG recordings followed for the next 30 minutes under general anaesthesia (periods C and D). The dominant frequencies of slow waves were compared between the baseline intervals A and B and periods C and D under general anaesthesia. Results The mean dominant frequency was within the normal range (2.3 – 3.5 cycles per minute) in all animals in all regimens. Thiopental general anaesthesia did not influence any change of the dominant frequency of slow waves. Nitrous oxide general anaesthesia increased the dominant frequency of slow waves in a statistically significant manner (baseline: 2.93 ± 0.53 and 3.01 ± 0.53; under general anaesthesia: 3.25 ± 0.34 and 3.29 ± 0.38 cycles per minute; p < 0.001, p = 0.003, p < 0.001, p < 0.001). Nitrous oxide together with isoflurane induced a statistically significant decrease of dominant frequency in the last 15-minute interval (2.66 ± 0.55 cycles per minute) compared to the baseline recording (2.81 ± 0.49; p = 0.030). Conclusions All changes of porcine gastric myoelectric activity assessed by the dominant frequency of slow waves during EGG remained within the normal range although some of them achieved statistical significance. Thus all tested agents used for general anaesthesia can be recommended in preclinical studies with porcine models focused on gastric myoelectric activity without any risk of compromising the results. Thiopental seems to be the most suitable as it did not cause any changes at all.
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Affiliation(s)
- Ilja Tachecí
- 2nd Department of Internal Medicine - Gastroenterology, Charles University in Prague, Faculty of Medicine and University Hospital, Hradec Králové, Czech Republic.
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