Summed score of the Patient Health Questionnaire-9 was a reliable and valid method for depression screening in chronically ill elderly patients
Femke Lamers, Catharina C.M. Jonkers, Hans Bosma, Brenda W.J.H. Penninx, J. André Knottnerus, Jacques Th. M. van Eijk
2008-03-03articleJournal of Clinical Epidemiology191 citationsclosed
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