伦敦帝国学院的研究人员撰写了这份报告。他们的研究结果发表在英国医学杂志《柳叶刀》上。
Researchers from Imperial College London wrote the report. Their findings were published in the British medical journal the Lancet.
报告作者援引英国医学杂志《柳叶刀》的一项研究称，妊娠和分娩时死亡的美国女性相对较多。
More American women also are dying during pregnancy and childbirth, the authors note, quoting a Lancet study.
这项研究是同类研究中最大的，发表在英国医学杂志《柳叶刀》上。
The study, the largest of its kind, appears in the British medical journal the Lancet.
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