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Twilight: filter the blue light of your device and sleep better

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  • Twitter Follow Arthur Henrique Bossi at @ahbossi.

  • Funding AHB is a CNPq (Brazillian research funding) scholarship holder. The funder had no role in the study design; in the collection, analysis and interpretation of the data; in the writing of the report; and in the decision to submit the manuscript for publication.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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