Patienter, som ved baseline kunne gå mere end 5 meter (m) men mindre end 250 m på 6 minutter i en 12 minutters gangtest eller mindre end 400 m ved 12 minutters tidspunktet, blev rekrutteret i studiet.
Patients who could walk more than 5 meters (m) but less than 250 m in 6 minutes of a 12 Minute Walk test or less than 400 m at the 12 minute time point at baseline were enrolled in the study.