Long-term treatment of children with epilepsy with valproate or carbamazepine may cause subclinical hypothyroidism - Eirís-Puñal, J; Del Río-Garma, M; Del Río-Garma, M C; Lojo-Rocamonde, S; Novo-Rodríguez, I; Castro-Gago, M (Epilepsia, 1999)