Association Between Employment Status and Short Sleep Duration Among Middle-Aged Japanese: the Survey on Time Use and Leisure Activities. - Maeda, Mitsuya; Filomeno, Ronald; Kawata, Yumi; Sato, Tomoyo; Maruyama, Koutatsu; Wada, Hiroo; Ikeda, Ai; Tanigawa, Takeshi (International Journal of Behavioral Medicine, 2020)