 Lin and colleagues performed a study to see when and if phlebotomy overdraw was actually a significant problem.They recorded all of the data that could be of influence such as the test performed, the blood collection container used, the infants location (neonatal intensive care unit (NICU) and intermediate intensive care unit), the infant’s weight sampling and the phlebotomist’s level of experience, work shift, and clinical role.Infants were classified by weight into 3 groups