%0 Journal Article %A Jennifer Gill %A Vinay Prasad %T Testing for blinding in sham-controlled studies for procedural interventions: the third-party video method %D 2019 %R 10.1503/cmaj.181590 %J Canadian Medical Association Journal %P E272-E273 %V 191 %N 10 %U https://www.cmaj.ca/content/cmaj/191/10/E272.full.pdf