1. Institute of Medical and Human Genetics, Charité - Universitätsmedizin Berlin; Berlin D-13353 Germany
2. Institute of Human Genetics, Martin Luther University Halle-Wittenberg; Halle D-06112 Germany
3. Research Group “Psychiatric Genetics and Genetic Epidemiology,” Psychiatric University Hospital; Zurich CH-8032 Switzerland
4. Pediatric Pneumology and Immunology and Interdisziplinäres Sozialpädiatrisches Zentrum; Charité - Universitätsmedizin Berlin; Berlin D-13353 Germany