Palliative care referrals in patients with pulmonary arterial hypertension: The Pulmonary Hypertension Association Registry.

Rohlfing AB, Bischoff KE, Kolaitis NA, Kronmal RA, Kime NA, Gray MP, Bartolome S, Chakinala MM, Frantz RP, Ventetuolo CE, Mathai SC, De Marco T, PHAR investigators