1 Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
2 Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
3 Johns Hopkins Surgery Center for Outcomes Research, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
4 Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland. Electronic address: [email protected].