However, no statistically significant changes were observed in other inflammatory indicators included in our present study, such as PCT, erythrocyte sedimentation rate (ESR), CD4+ T lymphocyte, white blood cell, neutrophil, etc. Meanwhile, a study enrolled PCP patients with inflammatory bowel disease and found that hypoproteinemia could affects prognosis of the patients (Yoshida et al., 2019). Here, CD4 is linked to inflammatory bowel disease.