TY  - RPRT
TI  - Epidemiology for the uninitiated. Observer variation.
AU  - G Rose
AU  - D J Barker
PY  - 1978
DO  - 10.1136/bmj.2.6143.1006
UR  - https://pubmed.ncbi.nlm.nih.gov/709176/
ID  - 709176
ER  -