Dave Lemus has been promoted to the newly created position of chief executive officer of Sigma-Tau Pharmaceuticals. Mr. Lemus has served as chief operating officer since March 2012, and joined the company as vice president of finance in July 2011.   Prior to joining the company, Mr. Lemus was executive vice president and chief financial officer of MorphoSys AG, where he launched Germany’s first biotech IPO in 1999. Before MorphoSys, Mr. Lemus held a variety of senior management positions a...