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Zhang C, Berger M, Malhotra A, Kales SN.Zhang C, et al. Among authors: kales sn.Sleep. 2012 Nov 1;35(11):1481-9. doi: 10.5665/sleep.2194.Sleep. 2012.PMID: 23115397Free PMC article.Review.
Parks P, Durand G, Tsismenakis AJ, Vela-Bueno A, Kales S.Parks P, et al.J Occup Environ Med. 2009 Mar;51(3):275-82. doi: 10.1097/jom.0b013e31819eaaa4.J Occup Environ Med. 2009.PMID: 19280762
Berger M, Varvarigou V, Rielly A, Czeisler CA, Malhotra A, Kales SN.Berger M, et al. Among authors: kales sn.J Occup Environ Med. 2012 Aug;54(8):1017-25. doi: 10.1097/JOM.0b013e3182572e16.J Occup Environ Med. 2012.PMID: 22850349Free PMC article.
Johnson KD, Patel SR, Baur DM, Edens E, Sherry P, Malhotra A, Kales SN.Johnson KD, et al. Among authors: kales sn.J Occup Environ Med. 2014 May;56(5):510-5. doi: 10.1097/JOM.0000000000000132.J Occup Environ Med. 2014.PMID: 24806564Free PMC article.