1 Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum, D-44789 Bochum, Germany; Ruhr Center for Rare Diseases, Ruhr University of Bochum and Witten/Herdecke University, Bochum, Germany. Electronic address: johannes.dietrich@ruhr-uni-bochum.de.
2 North Lakes Clinical, Ilkley, UK.
3 Department of Nuclear Medicine, Klinikum Luedenscheid, Luedenscheid, Germany.