[1] Tokyo Womens Med Univ Hosp, Dept Infect Dis, Shinjuku Ku, Tokyo, Japan
[2] Tokyo Womens Med Univ Hosp, Dept Hematol, Tokyo, Japan
[3] Tokyo Metropolitan Hlth & Med Treatment Corp, Tama Hokubu Med Ctr, Dept Internal Med, Tokyo, Japan
[4] Tokyo Womens Med Univ Hosp, Dept Dermatol, Tokyo, Japan