(Translated by https://www.hiragana.jp/)
 Proper napping may prevent risks of cancer in adulthood, says study- Edexlive
The Wayback Machine - https://web.archive.org/web/20210123134146/https://www.edexlive.com/news/2018/jan/28/proper-napping-may-prevent-risks-of-cancer-in-adulthood-says-study-1949.html