RT Journal Article SR Electronic T1 Using intranasal corticosteroids JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E47 OP E47 DO 10.1503/cmaj.201266 VO 193 IS 2 A1 Fowler, James A1 Sowerby, Leigh J YR 2021 UL http://www.cmaj.ca/content/193/2/E47.abstract