Q. This publication sometimes writes that there is “no clear evidence” about something when other people are publishing articles referencing plenty of supporting studies. How is this possible?

A. Dariush Mozaffarian, MD, DrPH, dean of the Friedman School and editor-in-chief of Tufts Health & Nutrition Letter answers: “While I cannot address your question directly unless I know the specific topics you are referring to, I can offer some general information. Often the situation you describe arises because of the nature of research and […]
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