Hirohisa Fujikawa1, Tadamasa Wakabayashi2. 1. Department of Medical Education Studies (Fujikawa), International Research Center for Medical Education, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Internal Medicine (Fujikawa, Wakabayashi), Suwa Central Hospital, Chino, Nagano, Japan hirohisa.fujikawa@gmail.com. 2. Department of Medical Education Studies (Fujikawa), International Research Center for Medical Education, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Internal Medicine (Fujikawa, Wakabayashi), Suwa Central Hospital, Chino, Nagano, Japan.