Sleep patterns among rural Chinese twin adolescents☆
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☆ This study is supported in part by Grant R01 HD049059 from the National Institute of Child Health and Human Development; R01 HL0864619 and 5T32HL007909-08 from the National Heart, Lung, and Blood Institute; and R01 AG032227 from the National Institute on Aging.
PII: S1389-9457(08)00147-0
doi:10.1016/j.sleep.2008.04.011
© 2008 Elsevier B.V. All rights reserved.
