RT Journal Article SR Electronic T1 Author Response JF Physical Therapy JO Phys Ther FD American Physical Therapy Association SP 170 OP 172 DO 10.2522/ptj.20080045.ar VO 89 IS 2 A1 Wulf, Gabriele A1 Lewthwaite, Rebecca A1 Landers, Merrill A1 Töllner, Thomas YR 2009 UL http://jcore-reference.highwire.org/content/89/2/170.abstract AB