Competition in neurosurgery: Part I.
D004465:Economic Competition; D005245:Fee Schedules; D018166:Health Care Reform / Q000458:organization & administration; D006298:Health Services Administration; D006801:Humans; D013677:Medical Laboratory Science; D009493:Neurosurgery; D009518:New York; D010817:Physician-Patient Relations; D011331:Private Practice / Q000191:economics / Q000458:organization & administration*; D012017:Referral and Consultation / Q000458:organization & administration