“…Available in the USA as Quickie Xtender, SunriseMedical, Longmont, Colorado), Alber E.motion [18,30,35,36,39,40] (Ulrich Alber GmbH, Albstadt-Tailfingen, Germany), Delta Glide [37] (DeltaGlide Inc., Hamden, Connecticut, was available from Independence Technology as the iGLIDE (Independence Technology, Warren, New Jersey), no longer available) and a prototype power-assisted wheelchair [27] (Indes Holding B.V., Enschede, The Netherlands, not yet available). The Alber E.motion and the Yamaha JWII systems are power-assisted wheels which fit on most of the handrim wheelchair frames.…”