METHODS
Patients and samplesThis study included a cohort of 87 American pediatric patients recruited in infancy (Figure 1). Serum samples were collected from children diagnosed with chronic dermatitis as previously described [9]. All subjects or their parents/guardians provided written consent for participation in the study. Sample collection and subsequent use of data was approved by the IU Institutional Review Board. Flow cytometry analysis of PBMCs collected throughout the course of the study was previously described [11].