Rural water-supply development and the recent appearance of endemic goitre.
D003124:Colorimetry; D006043:Goiter, Endemic / Q000453:epidemiology*; D006801:Humans; D007455:Iodine / Q000032:analysis; D009549:Nigeria; D014867:Water / Q000032:analysis; D014881:Water Supply
D014867:Water; D007455:Iodine