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Hla KM, Young T, Finn L, Peppard PE, Szklo-Coxe M, Stubbs M.Hla KM, et al. Among authors: peppard pe.Sleep. 2008 Jun;31(6):795-800. doi: 10.1093/sleep/31.6.795.Sleep. 2008.PMID: 18548823Free PMC article.
Nikodemova M, Finn L, Mignot E, Salzieder N, Peppard PE.Nikodemova M, et al. Among authors: peppard pe.Sleep. 2013 Jun 1;36(6):873-80. doi: 10.5665/sleep.2714.Sleep. 2013.PMID: 23729930Free PMC article.