PT - JOURNAL ARTICLE AU - J. P. Welch TI - Folic acid supplementation to prevent neural tube defects DP - 1994 Jul 01 TA - Canadian Medical Association Journal PG - 15--16 VI - 151 IP - 1 4099 - http://www.cmaj.ca/content/151/1/15.short 4100 - http://www.cmaj.ca/content/151/1/15.full SO - CMAJ1994 Jul 01; 151