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*{{pmid15845982}}
*<b>[http://www.kidney.de/mlpefetch.php?search=15845982 Reader s guide to critical appraisal of cohort studies: 2 Assessing potential for confounding ]</b> BMJ 2005; 330(7497) ; 960-2 Mamdani M; Sykora K; Li P; Normand SL; Streiner DL; Austin PC; Rochon PA; Anderson GM
*15845982*