1 Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
2 Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Ilinois, USA.
3 Division of Biostatistics, Feinberg School of Medicine, Northwestern University, Chicago, Ilinois, USA.
4 Department of Dermatology, Department of Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
5 Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Ilinois, USA. Electronic address: m-alam@northwestern.edu.