Serious Scarcity Substitution Instruments Sssis
TGA (CWLTH) resource. Rules Mate indexes this as part of the Australian compliance corpus. Click through for the regulator's primary source.
https://www.tga.gov.au/safety/shortages-and-supply-disruptions/medicine-shortages/accessing-medicines-during-shortage/serious-scarcity-substitution-instruments-sssis
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