Antibiotic Resistance Questions & Answers. Get Smart: Know When Antibiotics Work. Centers for Disease Control and Prevention, USA. 2009-06-30 [20 March 2013]. (原始内容存档于2015-04-29).
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Antibiotic Resistance Questions & Answers. Get Smart: Know When Antibiotics Work. Centers for Disease Control and Prevention, USA. 2009-06-30 [20 March 2013]. (原始内容存档于2015-04-29).