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Copyright ©The Author(s) 2023.
World J Gastrointest Endosc. Dec 16, 2023; 15(12): 681-689
Published online Dec 16, 2023. doi: 10.4253/wjge.v15.i12.681
Table 1 Characteristics of the included studies
Ref.Study designCountryStudy typeEnrollment period
Somsouk et al[28], 2014RUnited StatesUnicentric2002-2007
Ge et al[29], 2015RChinaUnicentric2008-2014
Calame et al[30], 2017RFranceUnicentric2010-2012
Kim et al[31], 2019RSouth KoreaUnicentric2003-2015
Salahshour et al[32], 2020RIranUnicentric2013-2019
Xie et al[33], 2020RChinaUnicentric2015-2018
Peisen et al[34], 2021RGermanyUnicentric2010-2019
Wan et al[35], 2021RChinaUnicentric2014-2019
Wan et al[36], 2022RChinaUnicentric2017-2020