Sleep quality in the general population: psychometric properties of the Pittsburgh Sleep Quality Index, derived from a German community sample of 9284 people
Andreas Hinz(Leipzig University), Heide Glaesmer(Leipzig University), Elmar Brähler(Leipzig University), Markus Löffler(Leipzig University), Christoph Engel(Leipzig University), Cornelia Enzenbach(Leipzig University), Ulrich Hegerl(Leipzig University), Christian Sander(Leipzig University)
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