RT Journal Article SR Electronic T1 Mild SARS in elderly patients JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 927 OP 927 DO 10.1503/cmaj.1031734 VO 170 IS 6 A1 Hing Ming Cheng A1 Timothy Kwok YR 2004 UL http://www.cmaj.ca/content/170/6/927.1.abstract