Education and information needs for physicians about rare diseases in Spain. - Ramalle-Gómara, Enrique; Domínguez-Garrido, Elena; Gómez-Eguílaz, María; Marzo-Sola, María Eugenia; Ramón-Trapero, José Luis; Gil-de-Gómez, Josefa (Orphanet Journal of Rare Diseases, 2020)