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- american public health association8
- university clinical, education & research associates (ucera)6
- university clinical education research associates5
- centers for disease control and prevention (cdc)1
- elsevier b.v.1
- elsevier bv1
- elsevier inc.1
- national center for chronic disease prevention & health promotion1
- u.s. dept. of health and human services, centers for disease control and prevention, national center for chronic disease prevention and health promotion1