Anemia, Iron-Deficiency Article Ferrosoferric Oxide Hemoglobins Humans Prospective Studies Retrospective Studies abdominal cramp adult arthralgia burn chest pressure cohort analysis controlled study diarrhea drug dose comparison drug efficacy drug infusion drug safety dyspnea evidence based practice female ferritin ferritin blood level ferumoxytol hemoglobin hemoglobin blood level human infusion related reaction iron deficiency anemia