Quan Phan, N., Lotts, T., Antal, A., Bernhard, J. D., & Ständer, S. (2012). Systemic Kappa Opioid Receptor Agonists in the Treatment of Chronic Pruritus: A Literature Review. Acta Dermato-Venereologica, 92(5), 555–560. https://doi.org/10.2340/00015555-1353