%0 Journal Article %T Objectively Measured Sleep Characteristics among Early-Middle-Aged Adults %A Lauderdale, Diane S. %A Knutson, Kristen L. %A Yan, Lijing L. %A Rathouz, Paul J. %A Hulley, Stephen B. %A Sidney, Steve %A Liu, Kiang %J American Journal of Epidemiology %V 164 %N 1 %P 5-16 %@ 0002-9262 %D 2006-07-01 %I Oxford University Press %~ DeepDyve