1. Division of Systems Medicine, School of Medicine, University of Dundee, UK
2. Montreal Diabetes Research Center, Centre Hospitalier de l'Université de Montréal, Montréal, QC, Canada
3. Department of Medicine, Université de Montréal, Montréal, QC, Canada
4. Research and Development Service, VA Puget Sound Health Care System, Seattle, Washington, USA
5. Department of Medicine, University of Washington, Seattle, Washington, USA