MILAN (Reuters) – The chief executive of Italian diagnostics group Diasorin will go on trial in April for alleged insider trading, one judicial and two legal sources said. A Milan judge indicted Carlo Rosa along with Alessandro Venturi, President of Policlinico San Matteo hospital in the northern city of Pavia, the sources told Reuters on Monday. Rosa and Venturi were not immediately available for comment. Diasorin and Policlinico San Matteo declined to comment on the trial, news of which sent the company’s Milan-listed shares to close 5.7% lower. A prosecutor’s document seen by Reuters showed…