U.S. regulators and the country's top cancer doctors urged Congress to help end the shortages of more than a hundred drugs, including those for deadly tumors. The House and Senate are working to merge bills passed last week that would require drugmakers to notify the Food and Drug Administration when they expect a disruption to production of medicines. The number of shortages have tripled since 2006 and include cisplatin for ovarian cancer and paclitaxel, a therapy given to women with breast cancer.