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2. Asthma (Discussion);Efron;J. Allergy,1936
3. Successful Treatment of Persistent Extreme Dyspnea, “Status Asthmaticus”;Herrmann;J. Lab. & Clin. Med.,1937
4. Theophylline Ethylenediamine (Aminophylline) in Bronchial Asthma;Efron;New Orleans M. & S. J.,1939
5. Aminophylline Deaths;Merrill;J. A. M. A.,1943