Letter: Plasma-copper in sickle-cell anaemia.
D000755:Anemia, Sickle Cell / Q000097:blood*; D044383:Black People; D003300:Copper / Q000097:blood*; D006801:Humans; D009549:Nigeria / Q000208:ethnology; D012959:Socioeconomic Factors; D044465:White People
D003300:Copper