Simonsen, A. B.; Larsen, M. H. H.; von Buchwald, C.; Kofoed, K. A Challenging Case of Subcutaneous and Mucosal Haemorrhage Caused by Urticarial Vasculitis (Urticaria Haemorrhagica Profunda). Acta Derm Venereol 2020, 100, 1-2.