HMO profits and quality.
Woolhandler
S
S
Himmelstein
D U
DU
Hellander
I
I
Wolfe
S M
SM
D006279:Health Maintenance Organizations / Q000191:economics / Q000592:standards; D006302:Health Services Research / Q000379:methods*; D006801:Humans; D007182:Income; D011787:Quality of Health Care; D014481:United States