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. SEATROPH. 2021;51(5):785-794. Accessed October 6, 2025. https://journal.seameotropmednetwork.org/index.php/jtropmed/article/view/288