Fig. 3

ACE and ACE2 activity in bronchoalveolar lavage fluid of ARDS patients. a ACE and b ACE2 activity in bronchoalveolar lavage (BAL) fluid of ARDS patients stratified by four age groups. c ACE2/ACE ratio. Horizontal bars represent the median. Group differences were tested with a Dunn’s test with Bonferroni correction for multiple comparisons. A p value less than 0.05 was considered statistical significant. ACE angiotensin converting enzyme