... onsetand the offset of the excretion were estimated by interpo-lation of times at which the excretion rate (ng/h) crossed the mesor level. The time of onset of aMT6s excretion wasestimated as the ... 1Department of Psychiatry and Ophthalmology, SUNY Downstate Medical Center, New York, NY, 2Brooklyn Research Foundation on Minority Health, KJMC, New York, NY, 3Department of Psychiatry, Maimonides ... model.Factors in these analyses were chosen because of theirassociations with the dependent measures and/or because of their hypothesized connection to melatonin. The selec-tion process was based on preliminary...