Recent studies have reported a link not only between and cardiometabolic complications, but also between OSA and both direct (hepatic histology) and indirect - serum alanine aminotransferase (ALT) or gamma-glutamyltransferase (GMT) markers of liver damage in morbidly obese patients with NAFLD in both adult and paediatric populations [11]. Here, GPT is linked to obstructive sleep apnea syndrome.