 Radnor, Pennsylvania--Newsfile Corp. - June 2, 2021 - The law firm of Kessler Topaz Meltzer Check, LLP reminds investors of FibroGen, Inc. NASDAQ: FGEN FibroGen that a securities fraud class action lawsuit has been filed against on behalf of those who purchased or acquired FibroGen securities andor sold put options from October 18, 2017 through April 6, 2021, inclusive the Class Period.Lead Plaintiff Deadline: June 11, 2021Website: James Maro, Esq. 484... 