PT  - JOURNAL ARTICLE
AU  - E. F. Juniper
TI  - Validated questionnaires should not be modified
AID  - 10.1183/09031936.00110209
DP  - 2009 Nov 01
TA  - European Respiratory Journal
PG  - 1015--1017
VI  - 34
IP  - 5
4099  - http://erj.ersjournals.com/content/34/5/1015.short
4100  - http://erj.ersjournals.com/content/34/5/1015.full
SO  - Eur Respir J2009 Nov 01; 34