A dropout analysis of the second phase of the Swedish part of the European Youth Heart Study
Protocolo de estudio
A.M. Grjibovski
P. Bergman
M. Hagströmer
A. Hurtig-Wennlöf
D. Meusel
F.B. Ortega
E. Patterson
E. Poortvliet
N. Rizzo
J.R. Ruiz
J. Wärnberg
M. Sjöström