PT - JOURNAL ARTICLE AU - W. D. Gutowski TI - Needle exchange programs and drug use DP - 1998 Jan 27 TA - Canadian Medical Association Journal PG - 170--171 VI - 158 IP - 2 4099 - http://www.cmaj.ca/content/158/2/170.4.short 4100 - http://www.cmaj.ca/content/158/2/170.4.full SO - CMAJ1998 Jan 27; 158