Biotechnology US biotech major Gilead Sciences (Nasdaq: GILD), best known for its prowess in antivirals (HIV and hepatitis dugs), yesterday (September 11) revealed that it has submitted a New Drug Application to the US Food and Drug Administration for approval of idelalisib, an investigational, targeted, oral inhibitor of PI3K delta, for the treatment of indolent non-Hodgkin's lymphoma (iNHL). 12 September 2013