In addition, upregulated levels of FIZZ1 and YM1 mRNA have also been found in parasite infection models [20], allergic lung inflammation and allergic peritonitis [21,23,24], bleomycin-induced lung fibrosis [25] and hypoxia-induced pulmonary hypertension [60]. The gene discussed is RETNLB; the disease is pulmonary arterial hypertension.