Hubungan antara pengetahuan dan sikap terhadap penyakit HIV/AIDS dengan tindakan pencegahan risiko tertularnya di kalangan petugas pelayanan Perinatal di lima rumah sakit pendidikan dan rujukan di Indonesia 1992 = The correlation between hiv/aids related knowledge, attitudes towards hiv/aids disease and preventive actions to reduce the risk of contracting hiv/aids among the perinatal health care providers in five teaching and referral hospitals in indonesia 1992