TY  - RPRT
TI  - Inter-doctor variation in sickness certification.
AU  - G Tellnes
AU  - L Sandvik
AU  - T Moum
PY  - 1990
DO  - 10.3109/02813439008994928
UR  - https://pubmed.ncbi.nlm.nih.gov/2141431/
ID  - 2141431
ER  -