@article{Koppitz2016, author = "Martin Koppitz and Charlotte Eschenburg and Emilia Salzmann and Martin Rosewich and Ralf Schubert and Stefan Zielen", title = "{Sputum weight and cells comparing smokers and non-smokers during treatment with Tyloxapol and saline.}", year = "2016", month = "6", url = "https://plos.figshare.com/articles/figure/Sputum_weight_and_cells_comparing_smokers_and_non-smokers_during_treatment_with_Tyloxapol_and_saline_/3449252", doi = "10.1371/journal.pone.0156999.g004" }