 Growing concern led other professional societies and human rights organisations to condemn the practice in the 1990s, and to question the way in which the organs were obtained.The WHO starting drafting an international guideline (WHA44.25) on human organ transplants in 1987 which resulted in the "WHO Guiding Principles on Human Organ Transplantation" being endorsed in 1991.However, the wording did not allow the international community to draw up any laws preventing China from continuing to trade in human organs.