MSU-Meridian mental health professor ‘defeats the giant’ with book release on narcissistic personality disorder Contact: Marianne Todd MERIDIAN, Miss.—It took 40 years and a Mississippi State ...

The authors caution that A.D.H.D. is underdiagnosed and that the subjects in their study — most of them diagnosed as young adults between 2000 and 2019 — might be among the more severely affected.