1 Columbia University Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, New York.
2 Department of Dermatology, Columbia University Irving Medical Center and New York-Presbyterian, New York, New York.
3 Department of Dermatology, Columbia University Irving Medical Center and New York-Presbyterian, New York, New York; Division of Pediatric Dermatology, Department of Dermatology, Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons and New York-Presbyterian, New York, New York.