Varas-Lorenzo C, Johannes C, McQuay L, Midkiff K, Stang MR, Fife D. Validation of serious ventricular arrhythmias in an administrative database. Poster presented at the 25th ICPE International Conference on Pharmacoepidemiology & Therapeutic Risk Management; August 16, 2009. Providence, RI. [abstract] Pharmacoepidemiol Drug Saf. 2009 Aug; 18(S1-273):S222.