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HON's mission is to guide lay persons or non-medical users and medical practitioners to useful and reliable online medical and health information. HON seeks to contribute to better, more accessible and cost-effective health care. Quality assessment has been our concern since the beginning. Have led international efforts to improve the quality of medical information on the Internet, notably through the HON Code of Conduct [1] (HONcode©) for healthcare site developers. This remains a HON priority.