The validity of the Hospital Anxiety and Depression Scale
Ingvar Bjelland
,
Alv A. Dahl
,
Tone Tangen Haug
,
Ingvar Bjelland
,
Alv A. Dahl
,
Tone Tangen Haug
,
Dag Neckelmann
2002
Journal of Psychosomatic Research
9,473 citations