MELBOURNE, Australia & MENLO PARK, Calif.--(BUSINESS WIRE)--ChemGenex Pharmaceuticals Limited (ASX: CXS) announced that positive safety findings from a combined analysis of two clinical trials for its lead product candidate, OMAPRO™ (omacetaxine mepesuccinate), were presented today during a poster discussion session at the 2010 American Society of Clinical Oncology (ASCO) Annual Meeting in Chicago, Illinois.