by
Katz, David L., 1963-
Format:
Books
Publication Date
2014
Excerpt:
Investigation -- 4.The Study of Risk Factors and Causation -- 5.Common Research Designs and Issues in
by
Jekel, James F.
Format:
Books
Publication Date
2007
Excerpt:
and research -- Common research designs used in epidemiology -- Assessment of risk and benefit in