Data analysis
Power analysis was not performed since this is a pilot study. Statistical analysis was performed using the free software R (www.r-project.org). The Wilcoxon Rank Test was used for comparisons between pre- and post treatment values. P-value significance was set at <0.05. Patient number 4 was excluded from analysis of BALF data as he did not undergo the follow-up bronchoscopy. Patient number 5 was excluded from all analyses as follow-up data was missing, due to a possible adverse event.