[1] Klinikum Bremen Ost, Klin Geriatrie Phys Med & Rehabil, Bremen, Germany
[2] Philipps Univ Marburg, Univ Klinikum Marburg, Klin Dermatol & Allergol, Hauttumor Zent, Marburg, Germany
[3] Philipps Univ Marburg, Univ Klinikum Marburg, Klin Anasthesie & Intensivtherapie, Marburg, Germany
[4] Philipps Univ Marburg, Fac 20, AG Ethik Med, Dekanat Humanmedizin, Marburg, Germany
[5] Univ Klinikum Marburg, Klin Anasthesie & Intensivtherapie, AG Ethik Med, Baldingerstr, D-35039 Marburg, Germany