Lung transplantation information:

http://www.nhlbi.nih.gov/health/health-topics/topics/lungtxp/

http://pats.atsjournals.org/cgi/content/full/6/1/13

http://pats.atsjournals.org/cgi/content/full/6/1/20

http://www.jhltonline.org/article/PIIS1053249806002518/fulltext

http://publications.milliman.com/research/health-rr/pdfs/2011-us-organ-tissue.pdf