TY - JOUR AU - Pop, V J; Kuijpens, J L; van Baar, A L TI - Low maternal free thyroxine concentrations during early pregnancy are associated with impaired psychomotor development in infancy JO - Clin Endocrinol (Oxf) IS - 2 VL - 50 PY - 1999 DO - 10.1046/j.1365-2265.1999.00639.x SP - 149 EP - 155 N1 - , et al. ER -