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References 1. Sack RL, Lewy AJ. Circadian rhythm sleep disorders: lessons from the blind. Sleep Med Rev. 2001:5;189-206. 2. Dressman MA, Licamele L, Feeney J, Polymeropoulos MH. Seventy percent of totally blind people with sleep complaints are not entrained to the 24-hour clock. Poster presented at: 26th Annual Meeting of the Associated Professional Sleep Societies, LLC; June 10, 2012; Boston, MA. Poster 49.