. . . . "??? Etiologies of PAH, WHO Group 1 included idiopathic in 62% (n=90), associated with connective tissue disease, including CREST and scleroderma, in 17%, (n=25), associated with anorexigen use in 6% (n=9), heritable PAH in 3% (n=5), other PPH in 3% (n=5), SLE in 1% (n=2), post-partum in 1% (n=2), and overlap/other in 5% (n=8)." .