Attitude of Health Personnel Dentists--statistics & numerical data France--epidemiology General Practitioners--statistics & numerical data Gynecology--statistics & numerical data Humans Insurance Coverage--statistics & numerical data Ophthalmology--statistics & numerical data Physician-Patient Relations Practice Patterns, Physicians' Private Practice--statistics & numerical data Quality Assurance, Health Care Radiology--statistics & numerical data Refusal to Treat--statistics & numerical data Retrospective Studies Sampling Studies Time Factors Universal Health Insurance--statistics & numerical data