1. The angiitides;Braverman,1998
2. The vascular purpuras;Lee,2006
3. The differential diagnosis of purpura from a morphologic perspective;Piette;Adv Dermatol,1994
4. Purpura: mechanisms and differential diagnosis;Piette,2008
5. Cutaneous manifestations of microvascular occlusion;Piette,2008