Our observations on prevalence among older HF patients of alterations in serum vitamin D [51,124,126,133,177,178,179], PTH [44,45,46,47,48,49,50,51,53,133,180], albumin levels [16,51,53,54,58,80,181,182,183,184,185,186,187,188,189] and liver function [76,77,107,110,190,191,192,193,194,195,196] are consistent with reported in the literature. The gene discussed is PTH; the disease is hydrops fetalis.