1 Department of Dermatology, University of Nebraska Medical Center, Omaha, Nebraska.
2 Department of Dermatology, University of Nebraska Medical Center, Omaha, Nebraska; University of Utah School of Medicine, Salt Lake City, Utah.
3 Department of Dermatology, University of Nebraska Medical Center, Omaha, Nebraska; Rush Medical College, Rush University Medical Center, Chicago, Illinois.
4 Department of Dermatology, University of Nebraska Medical Center, Omaha, Nebraska. Electronic address: [email protected].