Effects of bright light on sleepiness, melatonin, and 25-hydroxyvitamin D(3) in winter seasonal affective disorder.
Biol Psychiatry. 1996 May 15;39(10):865-72. doi: 10.1016/0006-3223(95)00294-4.
Biol Psychiatry. 1996.
PMID: 9172707