GPT and diabetes mellitus: Healthy donors and COVID‐19 patients (Group 1 & 2) did not differ with respect to age, sex, body mass index (BMI), smoking index, levels of blood urea nitrogen (BUN), creatinine (Cr), and alanine aminotransferase (ALT), history of hypertension, diabetes mellitus, dyslipidaemia, and coronary heart disease (P > 0.05).