<prompt> Direct immunofluorescenceDIF is negative in:Bullous PemphigoidCicatricial pemphigoidEpidermolysis Bullosa DystrophicaPemphigus Folaceous  <response>: All of the above are autoimmune disorders except Epidermolysis Bullosa Dystrophica which is because of defective collagen.7 in dermis and hence DIF is negative. 