[1] Tokyo Med & Dent Univ Hosp, Qual Management Ctr, Bunkyo Ku, 1-5-45 Yushima, Tokyo 1138510, Japan
[2] Japan Council Qual Hlth Care, Chiyoda Ku, 1-4-17 Toyo Bldg,Kandamisaki Cho, Tokyo 1010061, Japan
[3] Hiroshima Univ, Grad Sch Biomed & Hlth Sci, Minami Ku, 1-2-3 Kasumi, Hiroshima, Hiroshima 7348553, Japan
[4] Univ Tokyo, Grad Sch Med, Dept Publ Hlth, Bunkyo Ku, 7-3-1 Hongo, Tokyo 113170033, Japan