publication Journal Article 2019 Pyodermatitis vegetans responding to rifampicin and clindamycin Pyodermatitis vegetans more of publication The Role of Collagen IV and Cytokeratin 5/6 Immunohistochemistry in Identifying Subtypes of Hereditary Epidermolysis Bullosa by Ahmed Alhumidi 2018 Pigmented epithelioid melanocytoma 2014 Pyodermatitis vegetans responding to rifampicin and clindamycin by Nuha Alfurayh, MBBS,a Ahmed Alhumidi, MD,b and Salim Alkeraye, MDa Riyadh, Saudi Arabia 2019