TY  - CHAP
M1  - Book, Section
TI  - Chapter 13. Challenges of Observational Designs
A1  - Vock, David M.
A2  - Lopes, Renato D.
A2  - Harrington, Robert A.
Y1  - 2013
N1  - 
T2  - Understanding Clinical Research
AB  - Although  randomized  controlled  experiments  remain  the  gold  standard  for  medical  research,  observational  studies—studies  in  which  the  researcher  does  not  assign  or  alter  any  factor  of  interest—still  play  an  important  role.  
SN  - 
PB  - The McGraw-Hill Companies
CY  - New York, NY
Y2  - 2024/04/19
UR  - accessmedicine.mhmedical.com/content.aspx?aid=57836530
ER  -