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Contributors MR, RR: review of patients’ records and review of the literature. LPM: patient selection, review of the literature and preparation of manuscript. KTA, VOC: selection of the paediatric dermatology photographic archive, review of the literature and preparation of manuscript.
Competing interests None.
Patient consent Obtained.
Ethics approval The study was approved by the Research Ethics Committee of Parana Federal University.
Provenance and peer review Not commissioned; internally peer reviewed.
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