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 F01 Behavior and Behavior Mechanisms D001520 +
  F01.829 Psychology, Social D011593 +
   F01.829.263 Family D005190 +
    F01.829.263.500 Nuclear Family D009679 +
     F01.829.263.500.280 Only Child D009863 

 I01 Social Sciences D012942 +
  I01.880 Sociology D012961 +
   I01.880.225 Family D005190 +
    I01.880.225.500 Nuclear Family D009679 +
     I01.880.225.500.280 Only Child D009863