Medical record review to recover missing data in a Portuguese birth cohort: agreement with self-reported data collected by questionnaire and inter-rater variability Elisabete Alves, Nuno Lunet, Sofia Correia, Vítor Morais, Ana Azevedo, Henrique Barros

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

Epidemiological studies are like cherries, one draws another Nuno Lunet