1. Division of Endocrinology and Diabetes; Luzerner Kantonsspital; Luzern Switzerland
2. Epidemiology, Biostatistics and Prevention Institute; University of Zurich; Zurich Switzerland
3. Department of Clinical Chemistry; Luzerner Kantonsspital; Luzern Switzerland
4. Division of Pediatric Endocrinology and Diabetology and Children's Research Center; University Children's Hospital; Zurich Switzerland
5. Division of Hematology; Luzerner Kantonsspital; Luzern Switzerland
6. Institute of Laboratory Medicine; Kantonsspital Aarau; Aarau Switzerland
7. Immunodeficiency Clinic; Medical Outpatient Clinic and Department of Biomedicine; University Hospital Basel and University Basel; Basel Switzerland