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Source
Release date
February 2017
Region
United States
Survey time period
February 16 to 27, 2017
Number of respondents
739 respondents
Age group
18 years and older
Special properties
suffered at least once per month from headaches
Method of interview
Online survey
Supplementary notes
Original question: "What do you think causes your headache?"
Respondents could choose multiple answers.
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