PT - JOURNAL ARTICLE AU - G. Frampton AU - J. Shepherd TI - The (ab)use of symptom scores in asthma clinical trials: evidence from a systematic review AID - 10.1136/jech.2009.096719q DP - 2009 Oct 01 TA - Journal of Epidemiology and Community Health PG - 43--43 VI - 63 IP - Suppl 2 4099 - http://jech.bmj.com/content/63/Suppl_2/43.short 4100 - http://jech.bmj.com/content/63/Suppl_2/43.full SO - J Epidemiol Community Health2009 Oct 01; 63