MULTI-TIERED ELECTROCARDIOGRAM NETWORK SYSTEM: APPLICATION IN A REGIONAL MEDICAL ASSOCIATION IN PR CHINA: Zhi-Hua Gong1, Ming-Ming Zhang2, Yao Qu3 and Qing Xia3. (2020). The Southeast Asian Journal of Tropical Medicine and Public Health, 51(5), 785. https://journal.seameotropmednetwork.org/index.php/jtropmed/article/view/288