Deutsche Bank has kept its sell rating and 11,500p price target on AstraZeneca PLC (LSE:AZN, NASDAQ:AZN), the FTSE 100 pharmaceuticals giant, with the shares at 13,064p. The bank's analyst judged the company's investor event at the American Society of Clinical Oncology (ASCO) annual conference in Chicago as broadly incremental, acknowledging AZ's formidable oncology track record while pointing to unresolved questions that temper enthusiasm.