1 Department of Clinical Science and Education at Södersjukhuset, Karolinska Institutet, Stockholm, Sweden.
2 Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska University Hospital Huddinge, Karolinska Institutet, Stockholm, Sweden.
3 Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden.
4 Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden.