Quadratus Lumborum Block: Anatomical Concepts, Mechanisms, and Techniques: Erratum

A Clinical Focus Review on quadratus lumborum block published in the February 2019 issue1 cites seven case reports by Hironobu Ueshima:The seven Ueshima citations were retracted in 2022. The authors of the February 2019 article reviewed the retracted papers as well as their own publication, and this is their statement: