TableĀ 1

Results of the cluster analysis, domains and their reduced number of corresponding tools

DomainInitial No of toolsDiscarded after stage 2Discarded after stage 3Final core set
Clinical findings3013125
Echocardiography298192
Pulmonary function tests3316161
Biomarkers1192
Cardiopulmonary exercise1688
Imaging17710
ECG624
No of tools14263718