Brief clinical and laboratory observations.
D004912:Erythrocytes / Q000648:ultrastructure; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008857:Microscopy, Interference; D008858:Microscopy, Phase-Contrast; D012157:Mononuclear Phagocyte System / Q000502:physiology*; D013154:Spleen / Q000502:physiology*