Bergmann, K.-C., Lindemann, L., & Steinkamp, G. (2004). Salmeterol/fluticasone propionate (50/250 µg) combination is superior to double dose fluticasone (500 µg) for the treatment of symptomatic moderate asthma. Swiss Medical Weekly, 134(0304), 50–58. https://doi.org/10.4414/smw.2004.10403