Association of sleep quality, media use and book reading with behavioral problems in early childhood. The Ulm SPATZ Health Study-SAV3I1 Association of sleep quality, media use and book reading with behavioral problems in early childhood. The Ulm SPATZ Health Study-SAV3I1 Download Sleep well to perform well: the association between sleep quality and medical student performance in a high-stakes clinical assessment-SAV3I1 Low-intensity scheduled morning exercise for adolescents with a late chronotype: a novel treatment to advance circadian phase?-SAV3I1