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2. Paroxysmal atrial tachycardia with atrioventricular block;Burton, C.R.;Canadian Medical Association Journal,1962
3. Digitalis-induced cardiac arrhythmias;Chung, E.K.;American Heart Journal,1970
4. Supraventricular tachycardia with AV block;El-Sherif, N.;British Heart Journal,1970
5. Digitoxin poisoning: report of 30 cases;Flaxman, N.;American Journal of the Medical Sciences,1948