KIT and gastrointestinal stromal tumor: 3 Rubin Rubin BP BP Singer Singer S S Tsao Tsao C C Duensing Duensing A A Lux Lux ML ML Ruiz Ruiz R R KIT activation is a ubiquitous feature of gastrointestinal stromal tumors KIT activation is a ubiquitous feature of gastrointestinal stromal tumors Cancer Res Cancer Res 2001 2001 61 61 22 22 8118 8118 21 21 11719439 11719439