1. Department of Medicine; University Hospital Basel; Basel Switzerland
2. Cardiovascular Research Institute Basel; University Hospital Basel; Basel Switzerland
3. Cardiology Division; University Hospital Basel; Basel Switzerland
4. Labormedizinisches Zentrum Dr. Risch; Schaan Liechtenstein
5. Division of Laboratory Medicine; Kantonsspital Graubünden; Chur Switzerland
6. Division of Clinical Biochemistry; Medical University; Innsbruck Austria
7. Private University; Triesen Liechtenstein