Efficacy of combined undenatured type II collagen and hydrolysed collagen supplementation in knee osteoarthritis: a randomised controlled trial. - Yuenyongviwat, Varah; Anusitviwat, Chirathit; Tuntarattanapong, Pakjai; Hongnaparak, Theerawit; Iamthanaporn, Khanin (Scientific Reports, 2025)