1. http://srtr.transplant.hrsa.gov/annual_reports/2011/flash/03_liver/index.html#/2/zoomed . Accessed 31 Dec 2013.
2. http://srtr.transplant.hrsa.gov/annual_reports/2011/flash/03_liver/ . Accessed 31 Dec 2013.
3. Krowka MJ, Plevak DJ, Findlay JY, Rosen CB, Wiesner RH, Krom RA. Pulmonary hemodynamics and perioperative cardiopulmonary-related mortality in patients with portopulmonary hypertension undergoing liver transplantation. Liver Transpl. 2000;6(4):443–50.
4. Swanson KL, Wiesner RH, Nyberg SL, Rosen CB, Krowka MJ. Survival in portopulmonary hypertension: Mayo Clinic experience categorized by treatment subgroups. Am J Transplant. 2008;8(11):2445–53. doi: 10.1111/j.1600-6143.2008.02384.x . Epub 2008 Sep 8.
5. Rodriguez-Roisin R, Krowka MJ, Herve P, et al. Pulmonary-hepatic vascular disorders (PHD). Eur Respir J. 2004;24:861–80.