Letter
The more you look the more you find: problems of biases inherent in non-randomized studies.
P Bryant
British Journal of General Practice 1998; 48 (434): 1614.
In this issue

British Journal of General Practice
Vol. 48, Issue 434
September 1998
The more you look the more you find: problems of biases inherent in non-randomized studies.
P Bryant
British Journal of General Practice 1998; 48 (434): 1614.
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