ROSEN, A LEADING NATIONAL FIRM, Encourages Spectrum Pharmaceuticals, Inc. Investors with Losses in Excess of $100K to Secure Counsel Before Important Deadline in Securities Class Action – SPPI NEW YORK, Sept. 01, 2021 (GLOBE NEWSWIRE) -- WHY: Rosen Law Firm, a global investor rights law firm, announces the filing of a class action lawsuit on behalf of purchasers of the securities of...