1. Department of Medicine III; Jena University-Hospital; Jena Germany
2. Division of Endocrinology, Diabetes, and Bone Diseases; Dresden Technical University Medical Center; Dresden Germany
3. Institute of Clinical Chemistry and Laboratory Diagnostics; Jena University-Hospital; Jena Germany
4. Institute of Medical Statistics, Computer Sciences and Documentation; Jena University-Hospital; Jena Germany
5. Department of Orthopedics; Dresden Technical University Medical Center; Dresden Germany