“…The clinical characteristics of all included studies are illustrated in Table 1. The majority of them [3,6,12,14,16,17, were single-center, and 12 (1 RCT [13] and 11 observational studies [2,4,5,7,[86][87][88][89][90][91][92]) were multicenter. Among all the included studies, 53 studies (4 RCTs [12][13][14]32], 49 non-RCTs [4, 5, 7, 16, 17, 31, 33-37, 40, 42, 44, 47-49, 51, 52, 56, 60, 62-72, 78, 80-91]) compared the benefits of RAS versus CLS in rectal cancer, 11 (1 RCT [79], 10 non-RCTs [3,6,38,43,45,50,58,59,74,92]) in colon cancer and 9 (1 RCT [39], 8 non-RCTs [2, 41, 53-55, 57, 61, 77]) in colorectal cancer.…”