Celecoxib versus placebo as an adjunct to treatment-as-usual in children and youth with obsessive–compulsive disorder: protocol for a single-site randomised quadruple-blind phase I... oleh Lori Tucker, John R Best, Dean Elbe, Clara Westwell-Roper, Megan MacFadden, Susan Baer, Antony Au, Zainab Naqqash, Boyee Lin, Cynthia Lu, S Evelyn Stewart