1. Department of Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
2. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN 55905, USA.
3. Department of Dermatology, Mayo Clinic, Rochester, MN 55905, USA.
4. University of Minnesota Informatics Institute, University of Minnesota, Minneapolis, MN 55455, USA.