by
Katz, David L., 1963-
Format:
Books
Publication Date
2014
Excerpt:
Jekel's epidemiology, biostatistics, preventive medicine, and public health / Katz, David L., 1963-
by
Gordis, Leon.
Format:
Books
Publication Date
2009
Excerpt:
-- randomized trials / Assessing the efficacy of preventive and therapeutic measures -- some further issues