Susan Hirsch began choosing stocks here in March 2006 and took over lead portfolio-management duties in August 2007. She formerly led Jennison U.S. Emerging Growth, now named Jennison Mid Cap Growth PEEAX from December 1996 through August 2005. In August 2008, TIAA-CREF named Andrea Mitroff, a Merrill Lynch (now BlackRock) veteran, as comanager, though she doesn't have a role in day-to-day management.
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