LAMB2 and autoimmune bullous skin disease: In 1 M NaCl-split skin IIF (ssIIF), reactivity against the epidermal side corresponds to BP, while reactivity against the dermal side corresponds to anti-laminin 332 mucous membrane pemphigoid, epidermolysis bullosa acquisita, and anti-p200 pemphigoid (also called anti-laminin gamma 1 pemphigoid).