title: Co-occurrence does not imply association.
authors.affiliation: University of Cincinnati, College of Medicine, and the Department of Dermatology, Veterans Administration Medical Center, Cincinnati, OH 45267-0592, USA. adamsbb@email.uc.edu
authors.forename: Brian B
authors.initials: BB
authors.lastname: Adams
mesh_terms: D015897:Comorbidity; D017497:Hidradenitis Suppurativa; D006801:Humans; D017511:Pyoderma Gangrenosum