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Share of each first-line regimen for (A) preperiod cohort (January 1, 2002, to December 31, 2002) and (B) postperiod cohort (June 1, 2004, to May 31, 2005). FOLFIRI, fluorouracil plus irinotecan; FOLFOX, fluorouracil/leucovorin with oxaliplatin; FU, fluorouracil; IFL, fluorouracil plus irinotecan; LV, leucovorin.
