Protocol for a pragmatic randomized controlled trial evaluating a care pathway incorporating ultrasound-guided platelet-rich plasma injection plus physiotherapy versus physiotherapy alone in patients with L5/S1 lumbar disc herniation. - Islam R; Udoy MH; Islam MZ; Sayeed MA; Kabir F; Hossain MZ; Jahan S; Rahman E; Hossain MA; Hossain KMA (Contemporary clinical trials communications, 2026)