TY - JOUR A1 - Willis, B.L. A1 - Gao, A. A1 - Leonard, D. A1 - DeFina, L.F. A1 - Berry, J.D. T1 - Midlife fitness and the development of chronic conditions in later life Y1 - 2012 DO - 10.1001/archinternmed.2012.3400 JF - Archives of Internal Medicine VL - 172 IS - 17 ER -