Pengaruh Ekstrak Etanol Uncaria Gambir (Hunter) Roxb. terhadap viabilitas galur sel HepG2: Fokus terhadap ekspresi Sitoglobin, Nrf2 dan PDGFA = Effect of Uncaria gambir (Hunter) Roxb. ethanol extract on the viability of HepG2 cell line: Focus on cytoglobin, Nrf2, and PDGFA expressions