RT Journal Article SR Electronic T1 Periconceptual folate supplementation. JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 254 OP 254 VO 46 IS 405 A1 A Gillies A1 S McLeod A1 Y Carter YR 1996 UL http://bjgp.org/content/46/405/254.1.abstract AB