Hohenschurz-Schmidt D, Draper-Rodi J, Vase L, Scott W, et al. Blinding and sham control methods in trials of physical, psychological, and
self-management interventions for pain (article I): a systematic review and
description of methods. Pain 2022 Jul 11. pii: 00006396-990000000-00132.
PMID: 36265391