REGIONAL VARIATIONS IN THE EXPRESSION OF PEMPHIGUS VULGARIS, BULLOUS PEMPHIGOID AND EPIDERMOLYSIS BULLOSA ACQUISITA ANTIGENS IN NORMAL HUMAN SKIN Inflammatory epidermolysis bullosa acquisita with coexistent IgA antibodies to plectin 三种大疱病抗原在正常人皮肤不同部位的表达伴有抗网蛋白IgA抗体的获得性炎性大疱性表皮松解症