http://heart.bmj.com/content/early/2018/03/21/heartjnl-2017-312819?utm_source=trendmd&utm_medium=cpc&utm_campaign=heart&utm_content=consumer&utm_term=0-a

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See also  Consumption of coffee, green tea, oolong tea, black tea, chocolate snacks and the caffeine content in relation to risk of diabetes in Japanese men and women | British Journal of Nutrition | Cambridge Core