1. Institute of General Practice, Gemeinschaftspraxis Dr. Pelzer, Dr. Dr. Kroll, University Hospital Düsseldorf, Kleve, Germany
2. Institute of Biometry, Hannover Medical School, Hannover, Germany
3. Institute of General Practice, University Hospital Düsseldorf, Düsseldorf, Germany
4. Institute of Forensic Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
5. Pharmakovigilanz, MIT Gesundheit GmbH, Kleve, Germany
6. Institute of General Practice, Gemeinschaftspraxis Dr. Pelzer, Dr. Dr. Kroll, Kleve, Germany