AU  - Vock D
FAU  - Vock, David M.
AU  - Lopes R
FAU  - Lopes, Renato D.
AU  - Harrington R
FAU  - Harrington, Robert A.
TI  - Chapter 13. Challenges of Observational Designs
PT  - BOOK SECTION
DP  - 2013
BTI  - Understanding Clinical Research
DA  - 2013
Y2  - 2024/04/19
UR  - accessmedicine.mhmedical.com/content.aspx?aid=57836530