Fujita, Takanori, <p><em>Department of Health Policy and Management, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, </em><em>Tokyo, 160-8582, Japan; </em><em>School of Health Innovation, Kanagawa University of Human Services, 3-25-10 Tonomachi, Kawasaki-ku, Kawasaki</em></p> <p><em>shi, Kanagawa, 210-0821, Japan</em></p>, Japan