Talebi, S., A. Roudsari, S. Zolhavarieh, L. Majidi, H. Ghiasi, J. Poorolajal, and S. Vafaei. “Comparison of the Pain-Killing Effects of Leech Therapy Versus Physiotherapy in Patients With Knee Osteoarthritis: A Double-Blind Randomized Clinical Trial”. Biomedical Research and Therapy, Vol. 9, no. 6, June 2022, pp. 5095-01, doi:10.15419/bmrat.v9i6.744.