Sohail khan Raja, Mohammad Ali Arshad Abbasi, Rubina Rafique Shiekh, et al. INVESTIGATING THE ASSOCIATION BETWEEN BLOOD GROUPS, D-DIMER, AND NEUTROPHIL TO LYMPHOCYTE RATIO IN RELATION TO DISEASE SEVERITY AND OUTCOME: RETROSPECTIVE COHORT STUDY ON COVID-19 PATIENTS. J Popl Ther Clin Pharmacol. 2023;30(17):1664-1674. doi:10.53555/jptcp.v30i17.2775