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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 E05 Investigative Techniques D008919 +
  E05.318 Epidemiologic Methods D004812 +
   E05.318.780 Epidemiologic Research Design D015340 +
    E05.318.780.700 Random Allocation D011897 


 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.520 Epidemiologic Methods D004812 +
    G03.850.520.445 Epidemiologic Research Design D015340 +
     G03.850.520.445.700 Random Allocation D011897 


 H01 Natural Sciences D010811 +
  H01.770 Science D012586 +
   H01.770.644 Research D012106 +
    H01.770.644.728 Research Design D012107 +
     H01.770.644.728.805 Random Allocation D011897 


 N05 Health Care Quality, Access, and Evaluation D017530 +
  N05.715 Quality of Health Care D011787 +
   N05.715.360 Health Care Evaluation Mechanisms D017531 +
    N05.715.360.780 Epidemiologic Research Design D015340 +
     N05.715.360.780.675 Random Allocation D011897