1. The common cold;Heikkinen;Lancet,2003
2. Key findings of a national survey on cough medicine use;Consumer Healthcare Products Association,2007
3. Children's cough cold physician's study;Wyeth Consumer Healthcare,2007
4. Use of codeine- and dextromethorphan-containing cough remedies in children;American Academy of Pediatrics, Committee on Drugs;Pediatrics,1997
5. Toxicity of over-the-counter cough and cold medications;Gunn;Pediatrics,2001