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The main organs in a series of 39 nonagenarians were weighed at autopsy. The weights varied widely from subject to subject. Compared with average weights in younger subjects, the brains, livers, spleens, kidneys and lungs weighed less than usual in the majority of nonagenarians examined. However, the hearts often were heavier than normal and many of them were hypertrophied.
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Trevor H. Howell (1978) studied this question.
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