DE genes obtained from:

Travaglini KJ, Nabhan AN, Penland L, Sinha R, Gillich A, Sit RV, et al. 
A molecular cell atlas of the human lung from single-cell RNA sequencing. 2020 Nov;
587(7835):619–25. Available from: http://dx.doi.org/10.1038/s41586-020-2922-4

