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Shaffery JP, Oksenberg A, Marks GA, Speciale SG, Mihailoff G, Roffwarg HP.Shaffery JP, et al. Among authors: marks ga.Sleep. 1998 Dec 15;21(8):837-45. doi: 10.1093/sleep/21.8.837.Sleep. 1998.PMID: 9871946
Farber J, Marks GA, Roffwarg HP.Farber J, et al. Among authors: marks ga.Science. 1980 Aug 1;209(4456):615-7. doi: 10.1126/science.6994229.Science. 1980.PMID: 6994229