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E05 Investigative Techniques D008919 +
E05.318 Epidemiologic Methods D004812 +
E05.318.760 Epidemiologic Study Characteristics D016020 +
E05.318.760.550 Feasibility Studies D005240
G03 Environment and Public Health D004778 +
G03.850 Public Health D011634 +
G03.850.520 Epidemiologic Methods D004812 +
G03.850.520.450 Epidemiologic Study Characteristics D016020 +
G03.850.520.450.550 Feasibility Studies D005240
H01 Natural Sciences D010811 +
H01.770 Science D012586 +
H01.770.644 Research D012106 +
H01.770.644.300 Feasibility Studies D005240
N05 Health Care Quality, Access, and Evaluation D017530 +
N05.715 Quality of Health Care D011787 +
N05.715.360 Health Care Evaluation Mechanisms D017531 +
N05.715.360.775 Epidemiologic Study Characteristics D016020 +
N05.715.360.775.350 Feasibility Studies D005240