Efficacy and Safety of Traditional Transdermal Patch (Ya-Pok- Dud-Pid) in Primary Knee Osteoarthritis Patients: A Randomized Controlled Trial, Saereewat, Chutharat, Sriyakul Kusuma, Tungsukruthai Parunkul, Niempoog Sunyarn, Tungsukruthai Sucharat, and Kamalashiran Chuntida , Pharmacognosy Journal, June 2024, Volume 16, Issue 3, p.570-575, (2024)