Determine the trough (end of interval) concentration
See also
Other NCA parameters for concentrations during the intervals:
pk.calc.c0(),
pk.calc.cav(),
pk.calc.ceoi(),
pk.calc.clast.obs(),
pk.calc.cmax(),
pk.calc.count_conc()
Other NCA parameters for concentrations during the intervals:
pk.calc.c0(),
pk.calc.cav(),
pk.calc.ceoi(),
pk.calc.clast.obs(),
pk.calc.cmax(),
pk.calc.count_conc()