TY - JOUR A1 - Steptoe, A. A1 - Shankar, A. A1 - Demakakos, P. A1 - Wardle, J. T1 - Social isolation, loneliness, and all-cause mortality in older men and women Y1 - 2013 DO - 10.1073/pnas.1219686110 JF - Proc Natl Acad Sci U S A VL - 110 IS - 15 ER -