TGR2Top Gear Rally 2 (gaming)
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TRG1a was defined as complete tumour regression without residual tumour; TRG1b as subtotal tumour regression with <10% residual tumour cells; TGR2 as partial tumour regression with 10-50% residual tumour cells; and TRG3 as minimal or absent regression with >50% residual tumour cells with or without signs of treatment effects [10, 13, 25].