Figure 1From: Clinical research on liver reserve function by 13C-phenylalanine breath test in aged patients with chronic liver diseases % 13 C dose h -1 curves (A) and % 13 C cumulative excretion curves (B) after oral administration of L-[1- 13 C] Phenylalanine in elderly groups. Note: CHB, chronic hepatitis B; CTP, Child-Pugh;Back to article page