1 Department of Pediatrics, Division of Dermatology, Saint Louis University and Cardinal Glennon Children's Hospital, St. Louis, Missouri, USA. Electronic address: esiegfri@slu.edu.
2 Prescott Medical Communications Group, Chicago, Illinois, USA.
3 Department of Dermatology, University of California, San Diego School of Medicine/Rady Children's Hospital-San Diego, San Diego, California, USA.
4 Department of Dermatology, University of Texas-Houston Medical School, Houston, Texas, USA.
5 Department of Dermatology, Northwestern University Feinberg School of Medicine and the Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.