Three senior investment bankers who advise healthcare companies are the latest legacy Merrill Lynch executives to leave Bank of America ( BAC), after the two banks combined at the start of the year. According to The Wall Street Journal, which first reported the move, the bankers include Alan Hartman, head of M&A for the Americas at BofA and an adviser on Pfizer's ( PFE) $68 billion purchase of Wyeth ( WYE). The bankers will join Centerview Partners, a small New York-based advisory firm founded by former executives from UBS ( UBS) and Morgan Stanley ( MS). Senior investment bankers change jobs frequently at this time of year, after receiving year-end bonuses. This year, the movement has a different flavor, with lots of executives leaving banks whose pay practices are under great scrutiny due to the fact that they have accepted government funds. Even industry leader Goldman Sachs ( GS) has not been immune to the wave of defections.