[1] Charite Univ Med Berlin, Berlin, Germany
[2] Klinikum Ruhr Univ Bochum, Bochum, Germany
[3] Univ Lubeck, Lubeck, Germany
[4] Univ Hosp Munster, Munster, Germany
[5] Endokrinologikum Berlin, Berlin, Germany
[6] Univ Klinikum Ulm, Ulm, Germany
[7] Wurzburg Univ, Wurzburg, Germany
[8] Bavarian Hlth & Food Safety Author, Erlangen, Germany