Fig. 1From: Utility of bile acids in large airway bronchial wash versus bronchoalveolar lavage as biomarkers of microaspiration in lung transplant recipients: a retrospective cohort studyStudy flow diagram. The study cohort was derived from a parent cohort of patients with or without GERD, which we previously described. We excluded 8 patients with GERD and 7 patients without GERD who did not have matching LABW samples available at 3Â months after transplantation. We then combined the remaining 17 patients with GERD and 44 patients without GERD to form the study cohort of 61 patientsBack to article page