RT Journal Article SR Electronic T1 The sound of silence in humanitarian work JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E83 OP E83 DO 10.1503/cmaj.121164 VO 185 IS 1 A1 Gretchen Roedde YR 2013 UL http://www.cmaj.ca/content/185/1/E83.abstract