english: This study from 1999 used blood tests to confirm that the serotonin levels of the newly in love very closely resembled the serotonin levels of people who had been diagnosed with obsessive-compulsive disorder.
non_english: Ovo istraživanje iz 1999. je koristilo nalaze krvi da potvrdi da su nivoi serotonina kod onih tek zaljubljenih veoma slični nivoima serotonina kod ljudi kojima je dijagnostikovan opsesivno-kompulsivni poremećaj.