GPT and diabetes mellitus: T2DM, type 2 diabetes mellitus; HbA1c, glycated hemoglobin; BMI, Body Mass Index; VLCD, very low-calorie diet; ALT, alanine aminotransferase; ULN, upper limit of normal; NSAID, non-steroidal anti-inflammatory drug; NYHA, New York Heart Association; CAD, coronary artery disease; BP, blood pressure; LDL, low-density lipoprotein; MI, myocardial infarction.