Histopathology of Interstitial Fibrosis Degree Following Administration of East Java Nano Propolis in Adenine-Induced Chronic Kidney Disease Model (Rattus norvegicus) Muhammad Farid Yudistira Harimurti1, Joni Susanto2*, Eko Budi Koendhori3, Tri Hartini Yuliawati2, Nathan Adia Abiati1 Abstract Introduction: Chronic kidney disease is a worldwide health concern, with chronic inflammation and fibrosis