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Schwartz KA, Metz J, Feldman K, Sidbury R, Lindberg DM; the ExSTRA Investigators.Schwartz KA, et al.Pediatr Dermatol. 2014 Feb 26. doi: 10.1111/pde.12290. Online ahead of print.Pediatr Dermatol. 2014.PMID: 24612322