The validity of the Hospital Anxiety and Depression Scale
The validity of the Hospital Anxiety and Depression Scale on resea.org. DOI 10.1016/s0022-3999(01)00296-3. Ingvar Bjelland, Alv A. Dahl, Tone Tangen Haug, Dag Neckelmann.
Ingvar Bjelland, Alv A. Dahl, Tone Tangen Haug, Dag Neckelmann