Positive Effect of Daylight Exposure on Nocturnal Urinary Melatonin Excretion in the Elderly: A Cross-sectional Analysis of the HEIJO-KYO Study
Obayashi K*, Saeki K, Iwamoto J, Okamoto N, Tomioka K, Nezu S, Ikada Y, Kurumatani N
J Clin Endocrinol Metab, 97(11) 4166-4173, Nov, 2012