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Proc Natl Acad Sci U S A. 2009 Sep 8;106(36):15099-100. doi: 10.1073/pnas.0907905106. Epub 2009 Sep 1.

What is a social tie?

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  • Northwestern Institute on Complexity, Northwestern University, Evanston, IL 60201, USA. wuchtys@mail.nih.gov

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PMID:
19805245
[PubMed - indexed for MEDLINE]
PMCID:
PMC2741210
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