RT Journal Article SR Electronic T1 Diagnosis of asthma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 64 OP 64 DO 10.1503/cmaj.110-2010 VO 182 IS 1 A1 Anthony D. D’Urzo YR 2010 UL http://www.cmaj.ca/content/182/1/64.1.abstract