“Researchers took blood samples from 11 pairs of identical twins with different sleep patterns and discovered that the twin with shorter sleep duration had a depressed immune system, compared with his or her sibling. The findings were published Jan. 25 in the journal Sleep.”
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SA Gharib, MD et al. Transcriptional Signatures of Sleep Duration Discordance in Monozygotic Twins. Sleep, January 2017 DOI: 10.1093/sleep/zsw019