standards 24 Standards 23 Normalización 7 Normas 7 Standardization 6 prevention & control 5 Control de calidad 4 Quality Assurance, Health Care 4 Water quality 4 legislation & jurisprudence 4 Cost and standard of living 3 Health Policy 3 ISO 9000 Series Standards 3 Mental Health Services 3 Prevention 3 Public Policy 3 Quality control 3 Water 3 Water Pollution 3 Clinical Medicine 2 Delivery of Health Care 2 Drinking water 2 Educación 2 Education 2 Education, Higher 2 Environmental health 2 Food Contamination 2 Food contamination 2 Gas appliances 2 Health aspects 2