Conceptual foundation for measures of physical function and behavioral health function for Social Security work disability evaluation - Marfeo, E E; Haley, S M; Jette, A M; Eisen, S V; Ni, P; Bogusz, K; Meterko, M; McDonough, C M; Chan, L; Brandt, D E; Rasch, E K (Arch Phys Med Rehabil, 2013)