Expression of HLA-DR on monocytes and rate of apoptosis of monocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the implicated pathogens. Patients are divided according to sepsis severity. Single asterisk denotes a statistically significant difference between underlying infections after adjustment for multiple comparisons. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. SE: standard error.