TY  - RPRT
TI  - Bias: adding to the uncertainty.
AU  - J M Sparrow
AU  - J R Thompson
PY  - 1999
DO  - 10.1136/bjo.83.6.637
UR  - https://pubmed.ncbi.nlm.nih.gov/10340965/
ID  - 10340965
ER  -