Truncal acne: the burden of a hidden disease

João Patrocínio, Department of Dermatology, Unidade Local de Saúde de Santa Maria, Lisbon, Portugal Inês Abreu, Department of Dermatology, Unidade Local de Saúde de Santa Maria, Lisbon, Portugal Isabel Correia, Department of Dermatology, Unidade Local de Saúde de Santa Maria, Lisbon, Portugal Paulo Filipe, Dermatology and Venereology Department, Hospital de Santa Maria, Unidade Local de Saúde Santa Maria, Lisbon, Portugal; Dermatology and Venereology University Clinic, Faculty of Medicine, University of Lisbon, Lisbon, Portugal; Dermatology Research Unit, iMM João Lobo Antunes, University of Lisbon, Lisbon, Portugal