Measuring depression outcome with a brief self-report instrument: sensitivity to change of the Patient Health Questionnaire (PHQ-9)Bernd Löwe, Kerstin Gräfe, Kurt Kroenke et al.|Journal of Affective Disorders|2003Cited by 1.6k
Detecting and monitoring depression with a two-item questionnaire (PHQ-2)Bernd Löwe, Kerstin Gräfe, Kurt Kroenke|Journal of Psychosomatic Research|2005Cited by 1.5k