D’Arcy, S., Hamilton, C., Hughes, S., Hall, D. A., Vanneste, S., Langguth, B., & Conlon, B. (in press). Bi-modal stimulation in the treatment of tinnitus: a study protocol for an exploratory trial to optimise stimulation parameters and patient subtyping. BMJ Open, 7, Article e018465. https://doi.org/10.1136/bmjopen-2017-018465