Willingness to Pay for Elderly Tele-Care System Using Digital Terrestrial Broadcasting. - Katsuhiko Ogasawara; Satoshi Kaga; Teppei Suzuki; Yuji Tani; Fumihiro Higashikawa; Hisashi Enomoto; Hiroyuki Moriyama; Nobuyuki Kise (MedInfo, 2017)