AmerisourceBergen Corp. has made organizational changes, effective September 1, 2009. Steven H. Collis has been named executive vice president and president of AmerisourceBergen Drug Corporation (ABDC), the company’s largest subsidiary. Mr. Collis was previously executive vice president and president of AmerisourceBergen Specialty Group (ABSG). In his new role, he will lead the ABDC organization and will continue to report to R. David Yost, president and chief executive officer of AmerisourceBer...