This report has been drafted under the responsibility of the WHO Secretariat, Department of Essential Medicines and Health Products, Teams of Innovation, Access and Use and Policy, Governance and Knowledge. The WHO Secretariat would like to thank the following people for their contribution in producing this review report: Professor Jason White, Adelaide, Australia (literature search, review and drafting), Ms. Dilkushi Poovendran, Geneva, Switzerland (questionnaire analysis and report drafting) and Dr. Stephanie Kershaw, Adelaide, Australia (review report editing, questionnaire analysis and report drafting).

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