Effects of sodium glucose co-transporter-2 (SGLT2) inhibitor, empagliflozin, compared to dipeptidyl peptidase-4 inhibitor, sitagliptin on functions of the autonomic nervous system, peripheral nerves and muscles of the patients with type 2 diabetes attending National Hospital Galle and laboratory evaluation of the quality control parameters of commercially available SGLT2 inhibitor tablets in Galle, Sri Lanka.