FibroGen CEO Thomas Neff dies suddenly as company drives toward first FDA drug approval For more information please click here to contact Tuan Nguyen By Bizjournals.com Feed (2019-07-12 16:19:27) | August 26, 2019 Thomas Neff started the fibrotic disease drug maker in 1993 and now face decisions from regulators in the United States, Europe and Asia. Posted in Sacramento Business Journal