A 2 m.o. child with birth weight 5100 g has jaundice, hoarse cry, umbilical hernia, physical development lag. Liver is 2 cm enlarged, spleen is not enlarged. In anamnesis: delayed falling-away of umbilical cord rest. In blood: Hb- 120 g/L, erythrocytes - 4,5 × 1012/l, ESR - 3 mm/h. Whole serum bilirubin is 28 mcmole/L, indirect - 20 mcmole/L, direct - 8 mcmole/L. What is the most probable diagnosis?