US FDA puts Mersana Therapeutics's ovarian cancer study on hold
June 15 (Reuters) - Mersana Therapeutics Inc MRSN.O said on Thursday that the U.S. Food and Drug Administration (FDA) has issued a partial clinical hold on its ovarian cancer drug study. (Reporting by Khushi Mandowara in Bengaluru; Editing by Savio D'Souza) ((Khushi.Mandowara@thomsonreuters.com;))