Ridzwan, Irna Elina, Muhammad Harith Zulkifli, Nur Syafinaz Wasli, and Syed Mohd Syahmi Syd Mohmad Faudzi. 2016. “Kappa Antagonist to Prevent Drug Relapse: Does Stage in Addiction Cycle Matter?”. IIUM Medical Journal Malaysia 15 (1). https://doi.org/10.31436/imjm.v15i1.1385.