In cases where multiple mwTab files were deposited for the same study, it was not possible to retrieve which raw file belonged to which mwTab file. Therefore we attempted to associate raw files to mwTab files by utilizing the polarity mode reported in the mwTab files, if reported. This allowed us to rule out certain spectral file-mwTab file associations. If the association to a specific mwTab could not be established ambiguously, metadata was not considered.