Comment on

• Prevention of neural-tube defects with folic acid in China. China-U.S. Collaborative Project for Neural Tube Defect Prevention.

  Berry RJ, Li Z, Erickson JD, Li S, Moore CA, Wang H, Mulinare J, Zhao P, Wong LY, Gindler J, Hong SX, Correa A. Berry RJ, et al. N Engl J Med. 1999 Nov 11;341(20):1485-90. doi: 10.1056/NEJM199911113412001. N Engl J Med. 1999. PMID: 10559448
• Neural-tube defects.

  Botto LD, Moore CA, Khoury MJ, Erickson JD. Botto LD, et al. N Engl J Med. 1999 Nov 11;341(20):1509-19. doi: 10.1056/NEJM199911113412006. N Engl J Med. 1999. PMID: 10559453 Review. No abstract available.