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Vancouver, British Columbia – October 30, 2019 – Sirona Biochem Corp. TSX-V: SBM) (FSE: ZSB) (US-OTC: SRBCF) (“Sirona”) is pleased to announce that testing of the higher concentration formulation of TFC-1067, first announced in June 2019, will proceed to Human Patch Test, followed by a Human Repeat Insult Patch Test (HRIPT). Sirona’s scientific team at TFChem and the Senior Toxicologist at CEHTRA ( have reviewed recent in-vitro safety assays and verified that the compound can be tested at double the prior concentration. This concentration was chosen as we aim to achieve maximum efficacy ... [ more ]