[1] Bremen Inst Prevent Res & Social Med BIPS, Div Epidemiol Methods & Etiol Res, Bremen, Germany
[2] Univ Ghent, Dept Publ Hlth, Dept Movement & Sport Sci, B-9000 Ghent, Belgium
[3] Univ Ghent, Fac Med & Hlth Sci, B-9000 Ghent, Belgium
[4] Gothenburg Univ, Queen Silvia Childrens Hosp, Dept Paediat, Gothenburg, Sweden
[5] Univ Pecs, Fac Med, Dept Paediat, Pecs, Hungary
[6] Univ Zaragoza, EU Ciencias Salud, Growth Exercise Nutr & Dev GENUD Res Grp, Zaragoza, Spain
[7] CNR, Inst Food Sci, Unit Epidemiol & Populat Genet, I-00185 Rome, Italy
[8] Res & Educ Inst Child Hlth, Strovolos, Cyprus
[9] Natl Inst Hlth Dev, Tallinn, Estonia