Social inequalities, advanced maternal age, and birth weight. Evidence from a population-based study in Spain Chiara Dello Iacono; Miguel Requena; Mikolaj Stanek;

Serum metal levels in a population of Spanish pregnant women Miren Begoña Zubero; Sabrina Llop; Amaia Irizar; Mario Murcia; Amaia Molinuevo; Ferrán Ballester; Michael Levi; Manuel Lozano; Mikel Ayerdi; Loreto Santa-Marina;

ITC EUREST-PLUS Spain: protocol of a prospective longitudinal study of smokers in Spain Marcela Fu; Yolanda Castellano; Olena Tigova; Pete Driezen; Mary E. Thompson; Susan C. Kaai; Anne C.K. Quah; Geoffrey T. Fong; Constantine I. Vardavas; Esteve Fernández;