Researchers analyzed medical records of people in the Framingham Heart Study, which has been following the health of residents of that Boston suburb for more than a half century.

• 近朱者赤，近墨者黑，近肥胖者会发胖？肥胖是全球的公共健康问题，全世界大约有15亿的人超重，包括超过4亿的人肥胖。最近一项美国研究结论很有趣，您的肥胖标准是在对比中建立的。