Sutopo, B., Budihusodo, U., Hasan, I., Gani, R. A., & Yunihastuti, E. (2010). Acalculous Cholecystitis Prevalence on Abdominal Ultrasonography Examination of HIV/HCV Co-infection Patients in Cipto Mangunkusumo Hospital. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 11(1), 32–34. https://doi.org/10.24871/111201032-34