[1] Harvard Med Sch, Massachusetts Gen Hosp, 185 Cambridge St,Suite 2000, Boston, MA 02114 USA
[2] Coll Holy Cross, Dept Psychol, 1 Coll St,POB 38A, Worcester, MA 01610 USA
[3] Bowdoin Coll, Dept Psychol, 6900 Coll Stn, Brunswick, ME 04011 USA
[4] Harvard Med Sch, Massachusetts Gen Hosp, One Bowdoin Sq,7th Floor, Boston, MA 02114 USA
[5] Int OCD Fdn, POB 961029, Boston, MA 02196 USA
[6] St Louis Univ, Sch Med, St Louis Behav Med Inst, 1129 Macklind Ave, St Louis, MO 63105 USA