“…), 5 (4) organ transplantation, (5) surgery, (6) pregnancy/delivery, (7) nutritional deficiency and chronic alcoholism, and (8) other causes (diabetes mellitus, SLE, anti HTLV-1 antibody). 6 Among these factors, immunosuppressive therapy was performed for 4/15 cases in Japan and 4/10 overseas. In addition, HTLV-I antibody was positive in 6/15 cases in Japan, but was negative (or not investigated) in the overseas cases.…”