Randomised and non-randomised studies: threats to internal and external validity
CFB Sanderson;
M McKee;
A Britton;
N Black;
K McPherson;
C Bain;
(2001)
Randomised and non-randomised studies: threats to internal and external validity.
In: Stevens, A; et al, (eds.)
Advanced Handbook of Methods in Evidence Based Healthcare.
Sage Publications, pp. 95-115.
https://material-uat.leaf.cosector.com/id/eprint/17766