** Novocure's NVCR.O shares fall 35.8% to $19.10
premarket, among the biggest decliners across U.S. exchanges
before the open
** Co says a combination of its experimental therapy and
chemotherapy failed to extend survival in patients with a type
of ovarian cancer in a late-stage study
** Novocure's therapy generates electric fields to kill
cancer cells
** Shares of Novocure, which had a market cap of $3.2 bln as
of last close, have fallen nearly 40% since a separate trial in
June testing the therapy in lung cancer patients raised
questions around its commercial success
(Reporting by Manas Mishra and Christy Santhosh)
((Manas.Mishra@thomsonreuters.com;
www.twitter.com/Manaswrites15;))