五个非洲国家目前正在开展候选艾滋病毒疫苗的一期和二期临床试验：博茨瓦纳、肯尼亚、卢旺达、南非、乌干达，坦桑尼亚很快也将介入。
Five African countries are currently conducting phase I and phase II clinical trials of candidate HIV vaccines: Botswana, Kenya, Rwanda, South Africa, Uganda, soon to be joined by Tanzania.
大多数先前的分娩期介入研究已经关注主动分娩，显示在剖宫产率上影响很少。
Most previous studies of intrapartum interventions have focused on active labor, showing little effect on cesarean delivery rates.
目的探讨非急性期髂股静脉血栓形成的综合性介入治疗的临床价值。
Objective To evaluate the clinical feasibility of the comprehensive application of interventional techniques in treating non acute iliofemoral venous thrombosis.
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