These are the results of a study by researchers at the Johns Hopkins University Bloomberg School of Public Health .
这些是约翰·霍普金斯大学布鲁姆博格公共健康学院的研究人员所做的一项研究的结果。
One of the authors was Dr. Jean Nachega of South Africa's Stellenbosch University and the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland.
VOA: special.2011.07.20
That's Dr. Chelsea Polis, a family planning researcher at the Johns Hopkins University's Bloomberg School of Public Health.
VOA: standard.2010.03.22
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