Zeitzer, Jamie M When is a proxy not a proxy? The foibles of studying non-image forming light. [electronic resource] - The Journal of physiology 06 2018 - 2029-2030 p. digital Publication Type: Journal Article; Comment ISSN: 1469-7793 Standard No.: 10.1113/JP276076 doi Subjects--Topical Terms: Circadian RhythmHumansMelatoninRod Opsins