PT - JOURNAL ARTICLE AU - J. D. Armstrong TI - Evils of a two-tier system DP - 1989 Nov 01 TA - Canadian Medical Association Journal PG - 866--868 VI - 141 IP - 9 4099 - http://www.cmaj.ca/content/141/9/866.short 4100 - http://www.cmaj.ca/content/141/9/866.full SO - CMAJ1989 Nov 01; 141