1. 1Departments of Medicine (Endocrinology) and Neurological Surgery and Pituitary Center, Oregon Health & Science University, Portland, Oregon, USA
2. 2Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, The Netherlands
3. 3Department of Endocrinology, Leiden University Medical Centre, Leiden, The Netherlands
4. 4Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
5. 5Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
6. 6Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
7. 7Department of Endocrinology, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK