DOI:
10.1055/s-00000065
Die Rehabilitation
LinksClose Window
References
Concato J, Shah N, Horwitz RI.
Randomized, controlled trials, observational studies, and the hierarchy of
research designs.
N Engl J Med 2000;
342: 1887-1892 doi:10.1056/NEJM200006223422507
We do not assume any responsibility for the contents of the web pages of other providers.