Musfardi Rustam, Martha Hasanah Rustam, Afrinaldy Rustam, Yepi Kurniadi, Imam Slamet Prasetio and Umi Nadatul Annisa (2024) “Characteristics and comorbidity of confirmed COVID-19 death cases at the Arifin Achmad Hospital in Riau province from March 2020 to September 2021”, Journal of the Pakistan Medical Association, 74(5 (Supple), pp. S18-S20. doi: 10.47391/JPMA.Ind-RINC-05.