Attention-deficit hyperactivity disorder symptoms add risk to circadian rhythm sleep problems in depression and anxiety. - Bron, T.I.; Bijlenga, D.; Kooij, J.J.S.; Vogel, S.W.N.; Wynchank, D.; Beekman, A.T.F.; Penninx, B.W.J.H. (Journal of Affective Disorders, 2016)