CD14 and susceptibility to pneumonia measurement: We also explored DNA methylation levels at DNAse-HS-Chr22 and DNAse-HS-Chr8 in an external, publicly available microarray study on DNA methylation levels in CD14+ monocytes of critically ill patients with sepsis due to pneumonia (n=4), and a subset of healthy (age, sex-matched) control subjects (n=6) (GSE138074) [29].