TY  - RPRT
TI  - Negatively correlated external and internal symptom clusters.
AU  - W A Cassell
AU  - J L Richman
DO  - 10.1097/00006842-196801000-00011
UR  - https://pubmed.ncbi.nlm.nih.gov/4230392/
ID  - 4230392
ER  -