** Shares of Rocket Pharmaceuticals RCKT.O down 1.6% at $3.16 premarket
** Drug developer says it has withdrawn its application for potential U.S. approval of its experimental gene therapy, RP-L102, for a rare inherited blood disorder called Fanconi anemia
** RCKT says the move was driven by business strategy and not by concerns about safety or efficacy, and that it will consider external partnership opportunities for RP-L102
** Up to last close, stock down 74.5% YTD
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))