LAP3 and type 2 diabetes mellitus: There are several possible explanations for the increasing overall incidence of BP, including an ageing population, increased use of certain drugs that carry a risk for BP (especially dipeptidyl peptidase-4inhibitors, or gliptins, used to treat type 2 diabetes), increasing prevalence of comorbid conditions of BP, improvements in diagnostic tools, and increasing awareness of the different clinical variants of BP (4, 5).