PT - JOURNAL ARTICLE AU - M. Pare TI - Shift work may be hazardous to your health, doctors warned DP - 1989 Aug 01 TA - Canadian Medical Association Journal PG - 243--244 VI - 141 IP - 3 4099 - http://www.cmaj.ca/content/141/3/243.short 4100 - http://www.cmaj.ca/content/141/3/243.full SO - CMAJ1989 Aug 01; 141