Reference:
1. American pharmacists association. Drug information handbook with international trade names index. 21st ed. The United States of America: Lexi-Comp Inc; 2012
2. Globalrph the clinician’s ultimate reference. Pulmonary-aminophylline and theophylline. 1993 [updated 2012 Jun 27]. Available from: http://www.globalrph.com/pulmonary_theophylline.htm#Theophylline
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