Epidemiologic methods Epidemiology 7 Congresses 3 Methodology 3 Research 3 congresses 2 epidemiology 2 AIDS (Disease) 1 Acquired Immunodeficiency Syndrome 1 Causation 1 Clinical trials 1 Communicable diseases 1 Community mental health services 1 Community psychiatry 1 Epilepsy 1 Immunohematology 1 Immunological aspects 1 Intravenous drug abuse 1 Medical records 1 Mental disorders 1 Mental illness 1 Methods 1 Occupational diseases 1 Prevention 1 Serodiagnosis 1 Social Medicine 1 Social medicine 1 Social psychiatry 1 Statistical methods 1 Substance Abuse 1