Berra Ramos, Silvina del Valle; Ravens-Sieberer, Ulrike; Erhart, Michael; Tebé, Cristian; Bisegger, Corinna; Duer, Wolfgang; Ruden, Ursula von; Herdman, Michael; Alonso Caballero, Jordi; Rajmil Rajmil, Luis Alberto; European Kidscreen Group
(BioMed Central, 2007)
Background: The objective of the present study was to compare three different sampling and questionnaire administration methods used in the international KIDSCREEN study in terms of participation, response rates, and ...
