title: [Serum zinc, copper and magnesium levels in normal Chinese adults].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002681:China; D003300:Copper / Q000097:blood*; D005260:Female; D006801:Humans; D008274:Magnesium / Q000097:blood*; D008297:Male; D008875:Middle Aged; D012111:Residence Characteristics; D012737:Sex Factors; D015032:Zinc / Q000097:blood*
chemical_list: D003300:Copper; D008274:Magnesium; D015032:Zinc