Smith SM, Schroeder K, Fahey T. Smith SM , 编. Over-the-counter medications for acute cough in children and adults in ambulatory settings. Cochrane Database Syst Rev. 2008, (1): CD001831. PMID 18253996. doi:10.1002/14651858.CD001831.pub3.
Smith SM, Schroeder K, Fahey T. Smith SM , 编. Over-the-counter medications for acute cough in children and adults in ambulatory settings. Cochrane Database Syst Rev. 2008, (1): CD001831. PMID 18253996. doi:10.1002/14651858.CD001831.pub3.