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10 Tang JH, "Paired comparison of procedural sequence in same-day bidirectional endoscopy with moderate sedation and carbon dioxide insufflation: a prospective observational study" 22 : 360-365, 2016
1 Choi JS, "Which should go first during same-day upper and lower gastrointestinal endoscopy?:a randomized prospective study focusing on colonoscopy performance" 27 : 2209-2215, 2013
2 Hsieh YH, "Which should go first during same-day bidirectional endosocopy with propofol sedation" 26 : 1559-1564, 2011
3 Liberati A, "The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions : explanation and elaboration" 62 : e1-e34, 2009
4 IntHout J, "The Hartung-Knapp-Sidik-Jonkman method for random effects meta-analysis is straightforward and considerably outperforms the standard DerSimonian-Laird method" 14 : 25-, 2014
5 Lucendo AJ, "Sameday bidirectional endoscopy with nonanesthesiologist administration of propofol: safety and cost-effectiveness compared with separated exams" 26 : 301-308, 2014
6 Kurien M, "Same day bidirectional endoscopy : does the procedural order matter" 21 : 328-, 2012
7 Naing C, "Reporting ‘number needed to treat’ in meta-analyses : a cross-sectional study" 5 : 232-237, 2012
8 Lin JA, "Procedural sequence of bidirectional gastrointestinal endoscopy from the anaesthesiologist’s viewpoint" 113 (113): el11898-, 2014
9 Oner OZ, "Prior esophagogastroduodenoscopy does not affect the cecal intubation time at bidirectional endoscopies" 6 : 599-602, 2013
10 Tang JH, "Paired comparison of procedural sequence in same-day bidirectional endoscopy with moderate sedation and carbon dioxide insufflation: a prospective observational study" 22 : 360-365, 2016
11 Kazama T, "Optimal propofol plasma concentration during upper gastrointestinal endoscopy in young, middle-aged, and elderly patients" 93 : 662-669, 2000
12 Chen SW, "Optimal procedural sequence for same-day bidirectional endoscopy with moderate sedation : a prospective randomized study" 33 : 689-695, 2018
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14 Hozo SP, "Estimating the mean and variance from the median, range, and the size of a sample" 5 : 13-, 2005
15 Cao Y, "Comparison of procedural sequences in same-day painless bidirectional endoscopy : single-center, prospective, randomized study" 29 : 330-337, 2017
16 Cho JH, "Comparison of procedural sequences in same-day bidirectional endoscopy without benzodiazepine and propofol sedation:starting at the bottom or the top" 25 : 899-904, 2010
17 Carter D, "Comparison of procedural sequence in same-day consecutive bidirectional endoscopy using moderate sedation: a prospective randomized study" 48 : 236-240, 2014
18 Higgins JPT, "Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0" Cochrane Collaboration 2011
19 Higgins JPT, "A revised tool for assessing risk of bias in randomized trials" 10 (10): 29-31, 2016
20 Hohl CM, "A cost-effectiveness analysis of propofol versus midazolam for procedural sedation in the emergency department" 15 : 32-39, 2008
21 Urquhart J, "A closer look at same-day bidirectional endoscopy" 69 : 271-277, 2009