Figure 1.

Percentage of total caffeine intake per caffeine source. This figure shows the percentage of total caffeine intake per caffeine source (food frequency questionnaire data), n = 59,123, in the Norwegian Mother and Child Cohort Study 2002 to 2009.

Sengpiel et al. BMC Medicine 2013 11:42   doi:10.1186/1741-7015-11-42
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