Methods and representativeness of a European survey in children and adolescents: the KIDSCREEN study
Silvina Berra, Ulrike Ravens-Sieberer, Michael Erhart, Cristian Tebé, Corinna Bisegger, Wolfgang Duer, Ursula von Rueden, Michael Herdman, Jordi Alonso, Luis Rajmil* and the European KIDSCREEN group [kidscreen]