Varas-Lorenzo C, Stang MR, Tomas L, Gimeno V, Castellsague J, Perez-Gutthann S. Positive predictive value of ICD-9 Code 411 in the identification of cases of acute coronary syndrome in the Saskatchewan Hospital Database. Poster presented at the 22nd ICPE International Conference on Pharmacoepidemiology & Therapeutic Risk Management; August 2006. Lisbon, Portugal. [abstract] Pharmacoepidemiol Drug Saf. 2006 Aug; 15(S1):S231.