1. University of Minnesota Medical School , Minneapolis, MN , USA
2. Biostatistical Design and Analysis Center, Clinical and Translational Science Institute, University of Minnesota , Minneapolis, MN , USA
3. Best Practices Integrated Informatics Core, Clinical and Translational Science Institute, University of Minnesota , Minneapolis, MN , USA
4. Department of Dermatology, University of Minnesota , Minneapolis, MN , USA
5. Department of Internal Medicine, University of Minnesota , Minneapolis, MN , USA