HMOs look to rural market despite predominance of small employers.
D006264:Health Benefit Plans, Employee / Q000639:trends*; D007193:Independent Practice Associations / Q000600:supply & distribution*; D007348:Insurance, Health / Q000639:trends*; D008923:Missouri; D011331:Private Practice / Q000600:supply & distribution*; D012424:Rural Population; D014481:United States