TY  - RPRT
TI  - Pain assessment.
AU  - Mathias Haefeli
AU  - Achim Elfering
PY  - 2005
DO  - 10.1007/s00586-005-1044-x
UR  - https://pubmed.ncbi.nlm.nih.gov/16320034/
ID  - 16320034
ER  -