伦敦帝国理工学院的詹姆斯·边沁是这项研究的合著者之一。他表示，这种全球趋势可能主要归因于营养和医疗条件的改善。
James Bentham, a co-author of the research from Imperial College, London, says the global trend is likely to be due primarily to improvements in nutrition and healthcare.
在医疗保健方面，最要紧的是改善病房和医院周边的卫生条件。
In regards to healthcare, there is an urgent need for improved sanitation in the wards and around the hospital grounds.
有条件现金援助项目提高了医疗服务覆盖面，改善了人们的营养状况。
CCTs have led to wider use of health services and better nutritional status.
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