Age-related disruption of circadian rhythms: possible relationship to memory impairment and implications for therapy with magnetic fields

http://www.ncbi.nlm.nih.gov/pubmed/1955287
nt J Neurosci. 1991 Aug;59(4):259-62.
Sandyk R, Anninos PA, Tsagas N.
Department of Psychiatry, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY 10461.