1.     Ray WA et al. Oral erythromycin and the risk of sudden death from cardiac causes. N Engl J Med. 2004;351:1089-96.

2.     Morganroth J et al. Variability of the QT measurement in healthy men, with implications for selection of an abnormal QT value to predict drug toxicity and proarrhythmia. Am J Card. 1991;67:774-6 

3.     Owens RC. QT prolongation with antimicrobial agents. Drugs. 2004;64:1091-1124.