Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Epidermolysis bullosa acquisita ?
    ### Response:
    What causes epidermolysis bullosa acquisita? The underlying cause of epidermolysis bullosa acquisita (EBA) is not known. It is thought to be an autoimmune disorder, which means that the immune system attacks healthy cells by mistake. In EBA, certain immune proteins (usually IgG autoantibodies) mistakenly target and attack a specific type of collagen (a skin protein) involved in "anchoring" the skin.
    