This database study will compare the Pemphigus Disease Area and Severity Index (PDAI) and the Bullous Pemphigoid Disease Area Index (BPDAI) against other disease severity measures, including the Autoimmune Bullous Skin Disorder Intensity Score (ABSIS) and a physician's global assessment. Additionally, patients will be asked to rate their overall disease severity using a visual analogue scale, the patient's global assessment. Participants will also have the option to donate blood samples to our AIBD blood bank for immunologic and pathophysiologic studies.