NIRS-based neurofeedback training in a virtual reality classroom for children with attention-deficit/hyperactivity disorder: study protocol for a randomized controlled trial. - Blume, Friederike; Hudak, Justin; Dresler, Thomas; Ehlis, Ann-Christine; Kühnhausen, Jan; Renner, Tobias J.; Gawrilow, Caterina (Trials, 2017)