Smart Decentralization of Personal Health Records with Physician Apps and Helper Agents on Blockchain: Platform Design and Implementation Study[J] JMIR MEDICAL INFORMATICS 2021(9) Kim, Hyeong-Joon Kim, Hye Hyeon Ku, Hosuk Yoo, Kyung Don Lee, Suehyun Park, Ji In Kim, Hyo Jin Kim, Kyeongmin Chung, Moon Kyung Lee, Kye Hwa Kim, Ju Han
