1. Maternal valproic acid and congenital neural tube defects;Robert;Lancet,1982
2. Valproic acid and spina bifida;Bjerkedal;Lancet,1982
3. Spina bifida and in utero exposure to valproate;Lindhout;Lancet,1984
4. Pre-clinical, teratological studies on sodium valproate and other anticonvulsants;Whittle,1976
5. The teratogenic risk of anti-epileptic drugs;Janz;Epilepsia,1975