Thyroid hormones according to gestational age in pregnant Spanish women - Bocos-Terraz, J P; Izquierdo-Alvarez, S; Bancalero-Flores, J L; Alvarez-Lahuerta, R; Aznar-Sauca, A; Real-Lopez, E; Ibanez-Marco, R; Bocanegra-Garcia, V; Rivera-Sanchez, G (BMC Res Notes, 2009)