[1] Univ Gothenburg, Queen Silvia Childrens Hosp, Dept Paediat, Gothenburg, Sweden
[2] Univ Gothenburg, Inst Neurosci & Physiol, Gothenburg, Sweden
[3] Univ Toulouse 3, Univ Hosp, Natl Inst Hlth & Med Res, INSERM U558, F-31062 Toulouse, France
[4] Neuropsichiatria ASL Viterbo, UOC, Viterbo, Italy
[5] Enable Ireland Cork Serv, Cork, Ireland
[6] Univ So Denmark, Natl Inst Publ Hlth, Copenhagen, Denmark
[7] Queens Univ Belfast, Sch Nursing & Midwifery, Belfast, Antrim, North Ireland
[8] Univ Newcastle, Human Nutr Res Ctr, Newcastle Upon Tyne, Tyne & Wear, England
[9] Univ Klinikum Schleswig Holstein, Klin Kinder & Jugendmed, D-23538 Lubeck, Germany
[10] CHU Toulouse, Serv Epidemiol, Toulouse, France
[11] Univ Grenoble 1, SIIM Pole Exploitat, Grenoble, France
[12] Univ Newcastle, Sch Clin Med Sci, Newcastle Upon Tyne, Tyne & Wear, England