Incorrect citation Andrea Brancaccio, CNR, Istituto di Chimica del Riconoscimento Molecolare c/o Università Cattolica del Sacro Cuore 5 July 2007 Ref. 2 has been erroneously repeated twice, the second time with the number 17. Therefore, Ref. 17 was instead intended to refer to the following paper:Jung D, Yang B, Meyer J, Chamberlain JS, Campbell KP: Identification and characterization of the dystrophin anchoring site on beta-dystroglycan. J Biol Chem 1995, 270:27305-27310. Competing interests No competing interest.