Twins behaving badly.
Harding
J J
JJ
D000293:Adolescent; D000294:Adolescent Behavior; D004200:Diseases in Twins / Q000235:genetics*; D006801:Humans; D012920:Social Behavior Disorders / Q000235:genetics*; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic