Psychometric properties of the twelve item World Health Organization Disability Assessment Schedule II (WHO-DAS II) in Spanish primary care patients with a first major depressive episode

1. Luciano, J.V.
2. Ayuso-Mateos, J.L.
3. Fernández, A.
4. Serrano-Blanco, A.
5. Roca, M.
6. Haro, J.M.