Study setting {9}
PEx
The PEx cohort enrolls participants from CF treatment centers, comprising hospitals, their regional outreach clinics, and ambulatory care facilities. While enrolment is currently limited to Australian centers, the protocol permits extension to international sites. The addition of new sites is contingent upon the successful completion of a site feasibility assessment. All project staff are required to undergo good clinical practice training and project-specific training prior to their involvement. As of August 2022, ten Australian sites are participating. An updated list of participating sites is available on the study website located at 