The data fetched using the ZilionisLungData() function includes cells with the label "ND" as one of the "major cell types". Does anyone know what this means?
I have no idea, I'm afraid. AFAICT this was not added by me (see here) so I can only assume this is author-provided. Perhaps they could shed some light on it; I'm happy to add something to the dataset's description to help future users.
