%0 Journal Article %T Heritability of sleep quality in a middle-aged twin sample from Spain %A Madrid-Valero, Juan J %A Sánchez-Romera, Juan F %A Gregory, Alice M %A Martínez-Selva, José M %A Ordoñana, Juan R %J SLEEP %V 41 %N 9 %P 1 %@ 0161-8105 %D 2018-05-25 %I Sleep Research Society %~ DeepDyve