﻿Randomization and blinding
On the day of surgery, consented patients were randomly assigned to the LISB or MISB group (1:1) using SPSS 25.0 software (Statistical Program for Social Sciences, SPSS Inc., Chicago, Illinois, USA) by C.-M.G. who was not involved in the study. Allocation anonymity was ensured by enclosing assignments in sealed, opaque, and sequentially numbered envelopes opened by X.Y. Then, X.Y. prepared 0.5% ropivacaine (30 mL) for patients during the study period only upon their arrival in the operation room [