Hey interesting article, if you are to continue on the topic of selling kidneys, and such you might want to mention the financial aspect of getting a transplant and all of the money/costs involved, i.e. testing, insurance, fees for surgeons, recovery/time spent in hospital (stay) etc.;  
 http://www.transplantliving.org/before-the-transplant/financing-a-transplant/the-costs/ 
 http://www.cpmc.org/advanced/kidney/patients/topics/financing_kidney_transplant.html