Lead Sponsor: University of California, San Francisco

Collaborators: Children's Hospital Los Angeles, Children's Hospital of Philadelphia, University of Minnesota, Vanderbilt University, Stanford University, Indiana University, University of Texas, University of Utah, University of Chicago, University of Pittsburgh, Children's Hospital Medical Center, Cincinnati, Boston University, University of Washington, Washington University School of Medicine, Johns Hopkins University, University of New Mexico, Children's National Research Institute, Nationwide Children's Hospital, University of North Carolina, Pediatrix, Cook Children's Medical Center

Intervention / Treatment: DRUG: Erythropoietin, DRUG: Normal saline placebo