Kras mutation analysis of fine needle aspirate under EUS guidance facilitates risk stratification of patients with pancreatic mass - Maluf Filho, Fauze; Kumar, Atul; Gerhardt, René; Kubrusly, Márcia Saldanha; Sakai, Paulo; Hondo, Fábio Yuji; Matuguma, Sergio Eiji; Artifon, Everson Luiz de Almeida; Monteiro da Cunha, José Eduardo; Machado, Marcel Cerqueira Cesar; Ishioka, Shinichi; Forero, Elias (Journal of Clilnical Gastroenterology, 2007)