Earlier today, Roche ( RHHBY) presented new data on the use of Avastin in ovarian cancer. Other companies developing ovarian cancer drugs include Nektar Therapeutics ( NKTR) and Endocyte ( ECYT). --Written by Adam Feuerstein in Boston. >To contact the writer of this article, click here: Adam Feuerstein. >To follow the writer on Twitter, go to http://twitter.com/adamfeuerstein. >To submit a news tip, send an email to: email@example.com.