[1] Univ Cologne, Fac Med, Joseph Stelzmann Str 20, D-50931 Cologne, Germany
[2] Univ Hosp Cologne, Inst Hist Med & Med Eth, Joseph Stelzmann Str 20, D-50931 Cologne, Germany
[3] Med Fac, Inst Hist Philosophy & Eth Med, Moorenstr 5, D-40225 Dusseldorf, Germany
[4] Univ Hosp Duesseldorf, Moorenstr 5, D-40225 Dusseldorf, Germany
[5] Goethe Univ Frankfurt, Univ Hosp, Dept Neurol, Schleusenweg 2-16, D-60528 Frankfurt, Germany
[6] German Soc Neurol, Reinhardtstr 27 c, D-10117 Berlin, Germany