1 Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
2 Department of Medicine, New York University Grossman School of Medicine, New York, New York, USA; Department of Dermatology, New York University Grossman School of Medicine, New York, New York, USA.
3 Department of Dermatology, Brigham and Women's Hospital, Boston, Massachusetts, USA.
4 Department of Dermatology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA.
5 Division of Rheumatology, Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA.
6 Division of Rheumatology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
7 Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
8 Division of Dermatology, Department of Medicine, University of California Los Angeles, Los Angeles, California, USA.
9 Division of Cardiology, Department of Medicine, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, USA.
10 Department of Medical Social Sciences, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.
11 Division of Rheumatology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
12 Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA. Electronic address: joel.gelfand@pennmedicine.upenn.edu.