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Varas-Lorenzo C, Castellsague J, Stang MR, Tomas L, Aguado J, Perez-Gutthann S. Positive predictive value of ICD-9 codes 410 and 411 in the identification of cases of acute coronary syndromes in the Saskatchewan Hospital automated database. Pharmacoepidemiol Drug Saf. 2008 Aug 1;17(8):842-52.
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Varas-Lorenzo C, Maguire A, Castellsague J, Perez-Gutthann S. Quantitative assessment of the gastrointestinal and cardiovascular risk-benefit of celecoxib compared to individual NSAIDs at the population level. Pharmacoepidemiol Drug Saf. 2007 Apr 1;16(4):366-76.
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Derby LE, Gutthann SP, Jick H, Dean AD. Liver disorders in patients receiving chlorpromazine or isoniazid. Pharmacotherapy. 1993 Jul 1;13(4):353-8.