Further studies, including those with weight-loss interventions, experts say, are necessary to confirm a definitive link between obesity and pregnancy complications.
专家们也认为需要进一步研究（包括减肥的影响）来肯定肥胖和怀孕综合症之间存在必然关系。
Larger clinical trials with age - and weight-matched controls are required to obtain a definitive answer about the association between sleep apnea and glaucoma, he added.
他补充说，为了获得关于睡眠呼吸暂停和青光眼间联系的确定答案，需要做大量的有年龄和体重一致对照组的临床试验。
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