China carried out 8,000 kidney transplants last year but only 270, or fewer than 4% of the organs, came from voluntary donations.
"The use of mobile execution chambers exacerbates existing problems with prison-related issues in China," Sharon Hom, executive director of Human Rights in China, wrote in an e-mail interview. "It facilitates the black-market trade in organ sales particularly because there is no access for independent monitors, such as the Red Cross, to prisons, detention centers and labor camps."