United States Pulmonary Hypertension Scientific Registry (USPHSR): rationale, design, and clinical implications.
Elliott CG, Austin ED, Badesch D, Badlam J, Benza RL, Chung WK, Farber HW, Feldkircher K, Frost AE, Poms AD, Lutz KA, Pauciulo MW, Yu C, Nichols WC. United States Pulmonary Hypertension Scientific Registry (USPHSR): rationale, design, and clinical implications. Pulm Circ. 2019 Apr-Jun; 9(2):2045894019851696.