BMI, Fatigue, Depression, Unstable Emotions, CD27+CD28+ Th/Treg, CD27–CD28– Th/Treg, CD45RA–CD27– Th, and CD45RA+HLADR+ Th Cells May Be Important Characteristics of SLE Patients With Anxiety. Here, CD28 is linked to systemic lupus erythematosus.