PT  - JOURNAL ARTICLE
AU  - Andreas Perren
AU  - Paolo Merlani
TI  - The Difficulty of Measuring the Measurable
AID  - 10.4187/respcare.03380
DP  - 2014 Jun 03
TA  - Respiratory Care
PG  - respcare.03380
4099  - http://rc.rcjournal.com/content/early/2014/06/03/respcare.03380.short
4100  - http://rc.rcjournal.com/content/early/2014/06/03/respcare.03380.full