30.b cannot be answered, since great majority of specialists (87%) provide in-patient and out-patient services in public hospitals; 8% of specialists provide out-patient services in private practices, less than 1% of specialists provide in-patient and out-patient services in private hospitals; 4% of specialists provide out-patient services within public primary health care centres. Numbers cannot be separated by in-patient nor out-patient categories. 30.d cannot be answered. Physicians who work in private practices and have their main employment in public health care usually don't report their private affiliation in the National registry of health workers.