The results were released by the American Academy of Neurology.
The study was authored by Yee Ming Khaw, Danish Majid, Sungjong Oh, Eunjoo Kang & Makoto Inoue.
The California-based research team released their findings in the journal ASN Neuro.
The study was conducted by a team of researchers at the University of Alberta.
The study appeared online in the Journal of Neurology.
The study appears in the peer-reviewed journal Nature Reviews Neurology.