Shang, Y., Yeatman, H., Provasi, D., Alt, A., Christopoulos, A., Canals, M., & Filizola, M. (2016). Proposed Mode of Binding and Action of Positive Allosteric Modulators at Opioid Receptors. ACS Chemical Biology, 11(5), 1220-1229. https://doi.org/10.1021/acschembio.5b00712