Glatiramer acetate (Copaxone): comparison of continuous versus delayed therapy in a six-year organized multiple sclerosis trial. - Johnson, KP; Brooks, BR; Ford, CC; Goodman, AD; Lisak, RP; Myers, LW; Pruitt, AA; Rizzo, MA; Rose, JW; Weiner, LP; Wolinsky, JS (Multiple Sclerosis (13524585), 2003)