Social isolation, loneliness, and all-cause mortality in older men and women.
Proc Natl Acad Sci U S A. 2013 Apr 9;110(15):5797-801. doi: 10.1073/pnas.1219686110. Epub 2013 Mar 25.
Proc Natl Acad Sci U S A. 2013.
PMID: 23530191
Free PMC article.