K. M. Bhatti, “NOVEL USE OF AGE-ADJUSTED CHARLSON COMORBIDITY INDEX (ACCI) AS A RISK STRATIFICATION TOOL FOR DEVELOPMENT OF POSTOPERATIVE SARS-COV-2 INFECTION IN SURGICAL PATIENTS”, J Ayub Med Coll Abbottabad, vol. 33, no. 4, pp. 622–627, Oct. 2021.