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;

Monitoring health and health behaviors among adolescents in Central Catalonia: DESKcohort protocol Judit Rogés; Helena González-Casals; Marina Bosque-Prous; Cinta Folch; Joan Colom; Jordi Casabona; Gemma Drou-Roget; Ester Teixidó-Compañó; Esteve Fernández; Carmen Vives-Cases; Albert Espelt;

Sleep patterns in childhood: a longitudinal assessment from the Generation XXI birth cohort Marta Gonçalves; Ana Rute Costa; Milton Severo; Ana Henriques; Henrique Barros;