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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) (Jun. 2024), S18-S20. DOI:https://doi.org/10.47391/JPMA.Ind-RINC-05.