Consequences of loneliness on physical activity and mortality in older adults and the power of positive emotions
Health Psychology (2013) - Comment
pubmed: 22888819  doi: 10.1037/a0029413  issn: 1930-7810  issn: 0278-6133 

Nancy E. G. Newall, Judith G. Chipperfield, Daniel S. Bailis, Tara L. Stewart