Nakamoto I, Wang S, Guo Y, Zhuang W
A QR Code–Based Contact Tracing Framework for Sustainable Containment of COVID-19: Evaluation of an Approach to Assist the Return to Normal Activity
JMIR Mhealth Uhealth 2020;8(9):e22321
URL: mhealth.jmir.org/2020/9/e22321
DOI: 10.2196/22321
PMID: 32841151