Role of the Charlson Comorbidity Index in Predicting Long-Term Outcomes in Cardiovascular Disease Patients: A Narrative Review. - Rathod, Nishant; Kumar, Sunil; Acharya, Sourya; Chavhan, Roma; Patil, Rajwardhan; Karwa, Vineet (International Journal of Nutrition, Pharmacology, Neurological Diseases, 2025)