MidCog study: a prospective, observational cohort study investigating health literacy, self-management skills and cognitive function in middle-aged adults oleh Rachel O'Conor, Laura M Curtis, Michael S Wolf, Stacy C Bailey, Yuan Luo, Rebecca M Lovett, Andrea Russell, Minjee Kim, Mary J Kwasny, Julia Y Benavente, Pauline Zheng, Morgan Bonham, Han Q Luu, Patrick Cecil, Prophecy Agyare, Scott Hur, Fangyu Yeh, Phyllis C Zee