RT Journal Article SR Electronic T1 Elston B, Goldstein M, Makambi KH. Item response theory analysis of the Outpatient Physical Therapy Improvement in Movement Assessment Log (OPTIMAL). Phys Ther. 2013;93:661–671. JF Physical Therapy JO Phys Ther FD American Physical Therapy Association SP 1005 OP 1005 DO 10.2522/ptj.20120120.cx VO 93 IS 7 YR 2013 UL http://jcore-reference.highwire.org/content/93/7/1005.abstract AB