title: Twin studies of blood ionic content.
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001798:Blood Proteins / Q000032:analysis; D002118:Calcium / Q000097:blood; D004912:Erythrocytes / Q000032:analysis; D005260:Female; D005823:Genetics; D006400:Hematocrit; D006801:Humans; D007501:Iron / Q000097:blood; D008274:Magnesium / Q000097:blood; D008297:Male; D008875:Middle Aged; D008903:Minerals / Q000097:blood*; D008967:Molecular Biology; D011188:Potassium / Q000097:blood; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic; D015032:Zinc / Q000097:blood
chemical_list: D001798:Blood Proteins; D008903:Minerals; D007501:Iron; D008274:Magnesium; D015032:Zinc; D011188:Potassium; D002118:Calcium