Nonalcoholic Fatty Liver (NAFL): Overview -- Role of Leptin in Pathogenesis of NASH -- Zone 3 Predominance of Histopathological Features in Nonalcoholic Steatohepatitis -- Genetic Background of Japanese Patients with Nonalcoholic Steatohepatitis (NASH) -- Predictors of Nonalcoholic Steatohepatitis in Japanese Patients: Thioredoxin and NASH -- Clinical Features of Patients with Nonalcoholic Fatt…