Retraction: The Impact of Charlson Comorbidity Index on Mortality From SARS-CoV-2 Virus Infection

Affiliations

• ¹ Medicine, Liaquat National Hospital and Medical College, Karachi, PAK.
• ² Foundations of Clinical Research (FCR) Program, Harvard Medical School, Boston, USA.
• ³ Medicine, Universidad del Norte, Barranquilla, COL.
• ⁴ Medicine, Xavier University School of Medicine, Oranjestad, ABW.
• ⁵ Medicine, Ziauddin University, Karachi, PAK.
• ⁶ Medicine, Lahore Medical and Dental College, Lahore, PAK.
• ⁷ Medicine, Shifa College of Medicine, Islamabad, PAK.
• ⁸ Medicine, Ziauddin Medical University, Karachi, PAK.
• ⁹ Medicine, Ziauddin University Hospital, Karachi, PAK.