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Cecal but not hepatic cholesterol levels are increased in GF mice due to PHFD feeding. (A) Signal intensities of cecal cholesterol measured by ESI-FT-ICR/MS. (B) Signal intensities of hepatic cholesterol measured by ESI-FT-ICR/MS. SPF CD: n = 10 (A)/11 (B); SPF PHFD: n = 10; SPF LHFD: n = 10; GF CD: n = 10; GF PHFD: n = 10; GF LHFD: n = 10. Different superscript letters indicate significant differences (p < 0.05).
