Pemphigus and bullous pemphigoid in the United States: a 21-year analysis of patient characteristics, treatment patterns, and comorbidities.

To the Editor,Bullous dermatoses are autoimmune blistering skin diseases that can be potentially life-threatening. The incidences for bullous pemphigoid (BP) and pemphigus are 2.4–4 per 100,000 and...