TY  - RPRT
TI  - Selection bias in GP fundholding.
AU  - D L Baines
AU  - D K Whynes
DO  - 10.1002/(sici)1099-1050(199603)5:2<129::aid-hec190>3.0.co;2-r
UR  - https://pubmed.ncbi.nlm.nih.gov/8733105/
ID  - 8733105
ER  -