Per protocol analysis testing was performed. After the per protocol analysis, 31 patients (18 men and 13 women; mean age, 60.5±11.6 years; mean number of hospitalization days, 7.0±5.4 days) who had undergone systemic PR and 10 controls (six men and four women; mean age, 64.2±5.8 years; mean number of hospitalization days, 7.5±3.2 days) were enrolled in this study (Table 1).