Infant mortality and water hardness in the United States.
D002118:Calcium / Q000032:analysis; D005843:Geography; D006798:Housing / Q000592:standards; D006801:Humans; D007182:Income; D007226:Infant Mortality; D008274:Magnesium / Q000032:analysis; D008903:Minerals / Q000032:analysis*; D011188:Potassium / Q000032:analysis; D011891:Rain; D012964:Sodium / Q000032:analysis; D013223:Statistics as Topic; D014481:United States; D014867:Water / Q000032:analysis; D014881:Water Supply
D008903:Minerals; D014867:Water; D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium