Guidelines World Health Organization Series 2 Abortion 1 Abortion services 1 Abortion, induced - methods 1 Abortion, induced - standards 1 Analgesics, opioid 1 Biological products standards 1 Child 1 Drug and narcotic control 1 Drug, essential 1 Health policy 1 Maternal welfare 1 Metals, heavy adverse effects 1 Metals, heavy standards 1 Metals, heavy toxicity 1 Pain classification 1 Pain drug therapy 1 Pain measurement 1 Palliative care 1 Prenatal care - standards 1 Prenatal care organization and administration 1 Reference standards 1 Tobacco chemistry 1 Tobacco control campaigns 1 Tobacco industry legislation 1 Tobacco use disorder prevention and control 1 Vaccines standards 1 WHO Expert Committee on Biological Standards (2008: Geneva, Switzerland) 1