Critical Appraisal of Epidemiological Studies and Clinical Trials. 2nd edn. J. Mark Elwood, Oxford University Press, Oxford, 1998. No of pages: 448. Price: £29.50. ISBN 0-19-262745-7

2001 ◽  
Vol 20 (14) ◽  
pp. 2209-2210
Author(s):  
Thorkild. I. A. Sørensen
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