Inclusion Criteria:  Any infant born at PRISMA Health Richland hospital less than 32 weeks gestational age by obstetrical dating as indicated in the electronic medical chart admitted to the neonatal intensive care unit receiving one PRBC transfusion within the first month of life.  Exclusion Criteria:  Infants having neurological anatomical abnormalities or major brain hemorrhage (Grade III or IV), because neurological damage can interfere with thermal control.