hello
i found these two studies

- Brazilian Journal of Physical Therapy 25 (2021) 17---29
Beliefs about the body and pain: the critical role inmusculoskeletal pain management
J.P. Caneiroa,b,∗, Samantha Bunzlic, Peter O’Sullivana,ba


- Front Pain Res (Lausanne)
. 2021 Dec 7;2:750523. doi: 10.3389/fpain.2021.750523. eCollection 2021.
Placebo Responses and Their Clinical Implications in Fibromyalgia: A Meta-Analysis Using SSRI and SNRI Trials
Helen Koechlin 1 2, Anna Kharko 3, Tamara Probst 1, Julia Pradela 1, Stefan Buechi 4, Cosima Locher 1 3 4 5