Correction to: BMC Surg (2021) 21:188 https://doi.org/10.1186/s12893-021-01193-4

Following the publication of the original article [1], the authors have notified us of a mistake in the Legend for Fig. 1, in the lowest column of the study scheme:

Incorrect line: L-OHP( +) group (n = 26), L-OHP( −) group (n = 26).

Corrected line: L-OHP( +) group (n = 21), L-OHP( −) group (n = 21).

The original article has been corrected.