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 Vancouver, British Columbia - January 22, 2020 - Sirona Biochem Corp. (TSX-V: SBM) (FSE: ZSB) (US-OTC: SRBCF) (“Sirona”) announces that the final toxicology test, a Human Repeated Insult Patch Test (“HRIPT”), has successfully been completed. Sirona is now in preparation for the increased dose (0.4%) clinical study for its skin lightening compound TFC-1067. The HRIPT study was coordinated by Eurofins Dermscan in Poland ( and was executed by Eurofins EVIC Product Testing Romania under the direction of a clinical dermatologist. During the study, the formulation containing 0.4% TFC-1067 ... [ more ]