HPX and bronchopulmonary dysplasia: In addition to iNO treatment, which reduces BPD in infants of maternally-identified African-American women [35], therapies with scavenger proteins such as haptoglobin and hemopexin could reduce the concentration of hemoglobin and heme, respectively [31], One approach to address oxidative stress is superoxide dismutase, a therapy that has been tested in infants [36].