PDGFRA and gastrointestinal stromal tumor: Wardelmann Wardelmann E E Hrychyk Hrychyk A A Merkelbach-Bruse Merkelbach-Bruse S S Association of platelet-derived growth factor receptor alpha mutations with gastric primary site and epithelioid or mixed cell morphology in gastrointestinal stromal tumors Association of platelet-derived growth factor receptor alpha mutations with gastric primary site and epithelioid or mixed cell morphology in gastrointestinal stromal tumors J Mol Diagn J Mol Diagn 2004 2004 6 6 3 3 197 197 204 204 10.1016/s1525-1578(10)60510-7 10.1016/s1525-1578(10)60510-7 supplied-pmid 15269295?