Twins: separating the inseparable.
Claxton
J
J
D001293:Attitude to Death; D004200:Diseases in Twins; D004938:Esophageal Neoplasms / Q000523:psychology; D006117:Grief; D006801:Humans; D008297:Male; D008875:Middle Aged; D012801:Sibling Relations; D013274:Stomach Neoplasms / Q000523:psychology; D014427:Twins / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*