RT Journal Article SR Electronic T1 Hoarseness of unclear origin in adults JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E80 OP E80 DO 10.1503/cmaj.170660 VO 190 IS 3 A1 Angus P. Morgan A1 Matthew H. Rigby YR 2018 UL http://www.cmaj.ca/content/190/3/E80.abstract AB