Trace elements in soil and plants and antral cancer.
D000353:Africa, Southern; D002857:Chromium; D006801:Humans; D008443:Maxillary Sinus; D009532:Nickel; D010255:Paranasal Sinus Neoplasms / Q000139:chemically induced*; D010944:Plants / Q000032:analysis*; D010947:Plants, Toxic; D012987:Soil / Q000032:analysis*; D014026:Nicotiana; D015032:Zinc
D012987:Soil; D002857:Chromium; D009532:Nickel; D015032:Zinc