** Shares of drug developer SURF.O surge 57% to $4.18
premarket
** SURF top pct. gainer across U.S. exchanges - set to open
at 1-yr high
** Company, through a subsidiary, enters into a clinical
trial partnership with Merck & Co MRK.N to test its cancer
therapy, SRF617, with Keytruda urn:newsml:reuters.com:*:nGNX9h9ZM7
** The combination will be tested in patients with solid
tumors, focusing specially on gastric cancer and those who have
developed resistance to checkpoint inhibition - SURF
** Stock up 41.5% YTD, as of last close
(Reporting by Trisha Roy in Bengaluru)
((Trisha.Roy@thomsonreuters.com; within U.S. +1 646 223 8780,
outside U.S. +91 80 6182 3635;))