First Department of Internal Medicine;
Medical School;
National and Kapodistrian University of Athens;
Laiko General Hospital;
Athens 11527;
Greece;
First Propedeutic Department of Internal Medicine;
Medical School;
Aristotle University of Thessaloniki;
AHEPA Hospital;
Thessaloniki 54636;
Greece;
Lean nonalcoholic fatty liver disease; Non-obese nonalcoholic fatty liver disease; Clinical outcomes; Metabolic outcomes; Disease management; Lifestyle interventions;