On Dimensionality, Measurement Invariance, and Suitability of Sum Scores for the PHQ-9 and the GAD-7

1. Stochl, J.
2. Fried, E.I.
3. Fritz, J.
4. Croudace, T.J.
5. Russo, D.A.
6. Knight, C.
7. Jones, P.B.
8. Perez, J.