Rodzlan Hasani, Wan Shakira, Shubash Shander Ganapathy, Chong Zhuo Lin, Halizah Mat Rifin, Mohammad Nazaruddin Bahari, Muhammad Haikal Ghazali, Noor Aliza Lodz, et al. “Comorbidities and Clinical Features Related to Severe Outcomes Among COVID-19 Cases in Selangor, Malaysia”. Western Pacific Surveillance and Response 12, no. 1 (February 16, 2021). Accessed June 1, 2026. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/784.