Efficacy of biologically-directed daylight therapy on sleep and circadian rhythm in Parkinson's disease: a randomised, double-blind, parallel-group, active-controlled, phase 2 clin... by Beatrix Feigl, Simon J.G. Lewis, Lucy D. Burr, Daniel Schweitzer, Subodh Gnyawali, Dimitrios Vagenas, Drew D. Carter, Andrew J. Zele

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