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Table 1 Study sites

From: Development of the Pulmonary Arterial Hypertension-Symptoms and Impact (PAH-SYMPACT®) questionnaire: a new patient-reported outcome instrument for PAH

Site number

Phase of study

1

2

3

1

X

X

X

2

 

X

X

3

X

X

X

4

 

X

 

5

X