TY  - RPRT
TI  - Improving depression severity assessment--I. Reliability, internal validity and sensitivity to change of three observer depression scales.
AU  - W Maier
AU  - M Philipp
AU  - I Heuser
AU  - S Schlegel
AU  - R Buller
AU  - H Wetzel
PY  - 1988
DO  - 10.1016/0022-3956(88)90022-2
UR  - https://pubmed.ncbi.nlm.nih.gov/3397908/
ID  - 3397908
ER  -