Focused low-intensity hippocampal transcranial ultrasound stimulation (TUS) for sleep disturbances in patients with chronic tinnitus: A study protocol for a pilot randomized controlled trial - Xi Ni; Yuk Shan Yuen; Zeyan Li; Kaipeng Wang; Natalie Shu Yang; Yi Yuan; Lin Meng; Liwei Guo; Hanna Lu (PLoS ONE, 2025)