Multicenter Study

Cognitive impairment improves the predictive validity of the phenotype of frailty for adverse health outcomes: the three-city study.

J Am Geriatr Soc. 2009 Mar 1;57(3):453-61.
Review

The mental health module (BELLA study) within the German Health Interview and Examination Survey of Children and Adolescents (KiGGS): study design and methods.

Eur Child Adolesc Psychiatry. 2008 Dec 1;17 Suppl 1:10-21.
Article

Frailty and health-related quality of life among residents of long-term care facilities.

J Aging Health. 2013 Aug 1;25(5):792-802.