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Pediatric Henoch-Schonlein PurpuraPediatric Henoch-Schonlein Purpura. Willan and Heberden appeared to have first noted Henoch-Schoenlein (or Henoch-Schönlein) purpura (HSP) in the early 1800s.
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Acute Hemorrhagic Edema of InfancyAcute Hemorrhagic Edema of Infancy. Snow[1] first described acute hemorrhagic edema of infancy (AHEI) as a purely cutaneous variant of Henoch-Schönlein ...