n/a: not available. : immunosuppression definition includes one or more of the following: chemotherapy during the 60 days before lung biopsy, immunosuppressive medication including long term steroid use, organ transplantation, absolute neutrophil count < 1,000/mL, and/or AIDS. : baseline data only given for 83 (patients with ARDS as per Berlin definition) of the 113 patients. : history of malignant disease or having recently received or were undergoing chemotherapy.