RT Journal Article SR Electronic T1 Testing for blinding in sham-controlled studies for procedural interventions: the third-party video method JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E272 OP E273 DO 10.1503/cmaj.181590 VO 191 IS 10 A1 Jennifer Gill A1 Vinay Prasad YR 2019 UL http://www.cmaj.ca/content/191/10/E272.abstract AB