CFP and hydrops fetalis: Importantly, however, when we compared levels of FD (Fig. 5c) and properdin (Fig. 5d) in patients with preserved kidney function (i.e., eGFR > 60 mL∙min−1 ∙1.73 m−2) with control subjects, we still found significantly changed levels in HF, indicating that altered levels of these factors do not merely reflect impaired kidney function.