Eli Lilly and Company has made several leadership changes in the company’s corporate business development, oncology R&D, and managed healthcare services organizations.   Darren Carroll, senior vice president of corporate business development, will retire at the end of August after 22 years of service with the company. Carroll has led Lilly’s corporate business development organization for nearly a decade, including the $8.1 billion acquisition of Loxo Oncology earlier this year...