R. Ian Lennox has been appointed chairman of the board and chief executive officer of Ricerca Biosciences, LLC. Mr. Lennox has served executive chairman at the company since 2006.     Mr. Lennox previously served as chief executive officer, pharmaceutical and biotechnology markets, at MDS, Inc., chief executive officer, Phoenix International Life Sciences, and executive chairman and chief executive officer, Drug Royalty Corp. His career began at Monsanto, where he held various leadership posi...