Companion Protocol for Methacetin Breath Test (MBT) in Conatus Protocol IDN-6556-17

The protocol is intended to validate the ability of the MBT to predict deterioration by 48 weeks for all subjects, and at later time points for those followed longer, for subjects with decompensated NASH cirrhosis in the placebo treatment arm of Conatus' study IDN-6556-17. As one of the Conatus' study secondary objectives, this companion protocol is designed to assess improvement in liver metabolic function as measured by Methacetin Breath Test (MBT) \[ Time Frame: Baseline - Final Treatment Visit (at least 48 weeks to a max of 120 weeks) \].