Hidradenitis suppurativa prevalence in Berekum, Ghana: A cross-sectional study and initial validation of a questionnaire in an African setting - Paa Gyasi Hagan, MD; Rune Kjærsgaard Andersen, MD; Inge ten Seldam; Fleur van Gelder; Ceren Zwijnenburg; Jurr Boer, PhD; Gregor Borut Ernst Jemec, DMSc (Elsevier, 2020)