During the GCRG hospitalization, a bronchoalveolar lavage (BAL) will be done according to standard practice once per patients. Patients will be divided in cohort of 6 (3 females and 3 males). Each cohort will undergo the BAL at a specific time point: within 30 minutes of the end of DLPC-9NC treatment, at 3 hours, 8 hours, and 24 hours.