GTBP - GT Bio to commence patient enrollment in human GTB-3550 Trike mid-stage trial September, 12 2019 08:01 AM GT Biopharma Inc. GT Biopharma (OTCQB:GTBP) has notified FDA that it was commencing enrollment in its first-in-human GTB-3550 Phase I/II clinical trial.More news on: GT Biopharma, Inc., Healthcare stocks news, Read more ...