Centre de Recherche en Sante de Nouna, Nouna, Burkina Faso
Department of Surgery, Heidelberg, Germany
Department of Radiation Oncology, University of Heidelberg, Im Neuenheimer Feld 400, Heidelberg, Germany
University Clinics Heidelberg, Dept. Medicine1, Heidelberg, Germany
SRH Klinikum Karlsbad-Langensteinbach, Karlsbad, Germany
Department of Surgery, Ruprecht-Karls University, Heidelberg, Baden-Württemberg, Germany
Thoraxclinic at the University Hospital Heidelberg, Heidelberg, Baden-Wuerttemberg, Germany
Hospital Central Instituto de Prevision Social, Asuncion, Dep. Central, Paraguay
Thoraxclinic at the University Hospital Heidelberg, Heidelberg, Baden-Wuerttemberg, Germany
Dep of Ophthalmology, University of Mannheim, Mannheim, Germany