Department;
of;
Internal;
Medicine;
V,;
University;
of;
Heidelberg,;
Im;
Neuenheimer;
Feld;
410,;
D-69120;
Heidelberg,;
Germany;
Department;
of;
Orthopaedics,;
Orthopaedic;
University;
Hospital;
Heidelberg,;
Schlierbacher;
Landstrasse;
200a,;
D-69118;
Heidelberg,;
Germany;