Pragmatic trials of pain therapies: a systematic review of methods. - Hohenschurz-Schmidt, David; Kleykamp, Bethea A.; Draper-Rodi, Jerry; Vollert, Jan; Chan, Jessica; Ferguson, McKenzie; McNicol, Ewan; Phalip, Jules; Evans, Scott R.; Turk, Dennis C.; Dworkin, Robert H.; Rice, Andrew S.C. (PAIN, 2022)