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TO GO WITH AFP STORY BY MIE KOHIYAMA Doctor Monique Rey, obsessive compulsive disorder (OCD) specialist psychiatrist, poses in her office at the Lyon Lumiere clinic in Meyzieu on November 4, 2014. About 2 to 3 percent of French people suffer from OCD, a condition often underdiagnosed. AFP PHOTO / JEFF PACHOUD (Photo credit should read JEFF PACHOUD/AFP/Getty Images)

TO GO WITH AFP STORY BY MIE KOHIYAMA Doctor Monique Rey, obsessive compulsive disorder (OCD) specialist psychiatrist, poses in her office at the Lyon Lumiere clinic in Meyzieu on November 4, 2014. About 2 to 3 percent of French people suffer from OCD, a condition often underdiagnosed. AFP PHOTO / JEFF PACHOUD        (Photo credit should read JEFF PACHOUD/AFP/Getty Images)