An Architecture and Management Platform for Blockchain-Based Personal Health Record Exchange: Development and Usability Study[J] JOURNAL OF MEDICAL INTERNET RESEARCH 2020(22) Lee, Hsiu-An Kung, Hsin-Hua Udayasankaran, Jai Ganesh Kijsanayotin, Boonchai Marcelo, Alvin B. Chao, Louis R. Fisu, Chien-Yeh