DSC3 and pemphigus: The capability of anti‐Dsc3 autoantibodies to enforce the loss of keratinocyte adhesion was demonstrated by the keratinocyte dissociation assay, in which the number of fractions of cultured keratinocyte sheets were counted, after incubation with anti‐Dsc3 autoantibodies purified from sera of non‐classical pemphigus.53, 54