1. Division of Rheumatology; Department of Internal Medicine Mayo Clinic College of Medicine; Rochester MN USA
2. Department of Dermatology; Mayo Clinic College of Medicine; Rochester MN USA
3. Division of Biomedical Statistics and Informatics; Department of Health Sciences Research; Mayo Clinic College of Medicine; Rochester MN USA
4. Division of Epidemiology; Department of Health Sciences Research; Mayo Clinic College of Medicine; Rochester MN USA