Authors: P C Prorok; G L Andriole; R S Bresalier; S S Buys; D Chia; E D Crawford; R Fogel; E P Gelmann; F Gilbert; M A Hasson; R B Hayes; C C Johnson; J S Mandel; A Oberman; B O'Brien; M M Oken; S Rafla; D Reding; W Rutt; J L Weissfeld; L Yokochi; J K Gohagan Journal: Control Clin Trials Date: 2000-12