[1] McMaster Univ, Dept Psychiat & Behav Neurosci, Hamilton, ON, Canada
[2] McMaster Univ, MacAnxiety Res Ctr, Hamilton, ON, Canada
[3] Univ Hertfordshire, Queen Elizabeth II Hosp, Hertfordshire Partnership NHS Fdn Trust, Postgrad Med Sch,Natl Obsess Compuls Disorders Tr, Hatfield, Herts, England
[4] Univ Firenze, Inst Neurosci, Florence, Italy
[5] Brain Ctr Firenze, Florence, Italy
[6] Univ Milan, Dept Mental Hlth, Dept Biomed & Clin Sci Luigi Sacco, Milan, Italy
[7] Univ Torino, Dipartimento Neurosci, Turin, Italy
[8] Univ Sao Paulo, Inst & Dept Psychiat, OCD Spectrum Disorders Program, Hosp Clin,Fac Med, Sao Paulo, Brazil
[9] Montefiore Med Ctr, Albert Einstein Coll Med, Dept Psychiat & Behav Sci, New York, NY USA
[10] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[11] Stanford Univ, Dept Psychiat & Behav Sci, Stanford, CA 94305 USA
[12] Univ Minho, Sch Med, Life & Hlth Sci Res Inst ICVS, Braga, Portugal
[13] Univ Milan, Aldo Ravelli Ctr Neurotechnol & Brain Therapeut, Milan, Italy