Effects and safety of periconceptional folate supplementation for preventing birth defects.
De-Regil
Luz Maria
LM
Micronutrients Unit, Department of Nutrition for Health and Development, World Health Organization, 20 Avenue Appia, Geneva, Geneva, Switzerland, 1211.
Fernández-Gaxiola
Ana C
AC
Dowswell
Therese
T
Peña-Rosas
Juan Pablo
JP