| http://www.w3.org/ns/prov#value | - Dr. Hu and other researchers at Harvard examined several decades' worth of data on more than 200,000 people: 20 years of data from participants in the Health Professionals Follow-Up Study, 28 years of data from the Nurses' Health Study I, and 14 years of data from Nurses' Health Study II. They also looked at data on more than 400,000 others, including nearly 30,000 who developed type 2 diabetes.
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