ANALISIS FERITIN DAN AST TO PLATELET RATIO INDEX SEBAGAI PETANDA DERAJAT FIBROSIS PENYAKIT HATI KRONIS (Analysis Ferritin and AST to Platelet Ratio Index as a Marker Degree of Fibrosis Chronic Liver Disease) - Yasin, Yulianti (PERHIMPUNAN DOKTER SPESIALIS PATOLOGI KLINIK INDONESIA, 2018)