TY  - RPRT
TI  - Different behavioral observation methods serve different purposes.
AU  - Kenneth D Craig
AU  - Thomas Hadjistavropoulos
PY  - 2004
DO  - 10.1016/j.pain.2004.04.040
UR  - https://pubmed.ncbi.nlm.nih.gov/15288422/
ID  - 15288422
ER  -