LCN2 and Parkinson disease: Finally, Virzì et al., based on these previously obtained results, investigated the relationship between systemic eryptosis in PD-related peritonitis and specific peritonitis biomarkers in PD effluent (PDE), such as pWBC, pNGAL (Neutrophil Gelatinase-Associated Lipocalin), IL-6, and IL-1β.