Table 1.

Quality assessment of included clinical studies

Ref	Author	Selection	Comparability	Outcomes	Quality score
[17]	Asahi Y	★★★★	★	★	6/9
[18]	Goeppert B	★★★★	★	★★	7/9
[19]	Hasita H	★★★★	★★	★★	8/9
[20]	Kim HD	★★★	★★	★	6/9
[21]	Kim R	★★★	★★	★★	7/9
[22]	Kitano Y	★★★★	★★	★★	8/9
[23]	Lu JC	★★★★	★★	★	7/9
[24]	Miura T	★★★★	★★	★★	9/9
[25]	Oshikiri T	★★★★	★★	★	7/9
[26]	Tian L	★★★★	★★	★★★	9/9
[27]	Ueno T	★★★★	★★	★★★	9/9
[28]	Vigano L	★★★	★★	★★	7/9
[29]	Wu H	★★★★	★★	★★	8/9
[30]	Xu YP	★★★★	★★	★★	8/9

All included translational studies reporting oncological outcome were evaluated in accordance with the Newcastle-Ottawa scale [16]. The maximum score of the scale is nine points with studies being categorized as low (0-3 points), moderate (4-6 points) and high quality (7-9 points), respectively