Vitalstatus over længere tid for alle 235 patienter, som blev behandlet med bosentan, blev imidlertid noteret, i de to pivotale placebo- kontrollerede studier (AC- 052- 351 og AC- 052- 352) og/ eller deres to ukontrollerede, open- label forlængelser.
However, long-term vital status was recorded for all 235 patients who were treated with bosentan in the two pivotal placebo-controlled trials (AC-052-351 and AC-052-352) and/or their two uncontrolled, open- label extensions.