Erratum to: Socioeconomic status as a moderator between frailty and mortality at old ages.
United Nations Population Division, Two UN Plaza, DC2-1910, New York, NY, 20012, USA. gudanan@yahoo.com.
Danan
D
Gu
Department of Social Work, School of Sociology and Political Science, Shanghai University, Shanghai, China.
Fang
F
Yang
Department of Behavioral and Social Sciences, University of the Sciences, Philadelphia, USA.
Jessica
J
Sautter