The authors report confidence intervals for molecular parameters of the identified solutes, but it is not clear whether these were determined (1) by statistical analysis of the results obtained in each Monte Carlo iteration after the integration of putative solute peaks, or (2) if these confidence intervals reflect the uncertainties of the putative solute peaks in a distribution that, as a whole, has gained error bars at each grid point from the statistics of the Monte Carlo iterations. For method (1), the problem arises of how to identify the group peaks representing a putative solute species. For method (2), the question arises of whether the Monte Carlo approach is effective in providing parsimonious ''average'' distributions.