Nepal 12 Knowledge 10 Kathmandu 8 methods 8 HIV/AIDS 5 Public Health 5 prevention & control 5 standards 5 Educational intervention 4 Environmental aspects 4 Environmental health 4 Gezondheid 4 Health Promotion 4 Health aspects 4 Pollution 4 Quality Control 4 Research 4 Water 4 Water Microbiology 4 Water Pollution 4 Water Supply 4 Water quality 4 Water quality management 4 Children 3 Female sex workers 3 Health Education 3 Health education 3 Methodology 3 Mothers 3 Nurses 3