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BreakUps High-profile biotech deals became casualties of big pharma’s shifting priorities.
February 2010: Merck/Anacor
June 2010: BMS/Exelixis
October 2010: Merck/Aveo
February 2011: Merck/Galapagos
March 2011: Merck/Portola
March 2011: GSK/Targacept
May 2011: Pfizer/Rigel
May 2011: AstraZeneca/Targacept
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