Mental health in the aged: prevalence, covariates and related neuroendocrine, cardiovascular and inflammatory factors of successful aging.
Lacruz ME, Emeny RT, Bickel H, Cramer B, Kurz A, Bidlingmaier M, Huber D, Klug G, Peters A, Ladwig KH. BMC Med Res Methodol. 2010 Apr 30; 10:36. Epub 2010 Apr 30.