In WHO's Guiding Principles on Human Organ and Tissue Transplantation (2009), its Guiding Principle 7 declares that, "Physicians and other health professionals should not engage in transplantation procedures, and health insurers and other payers should not cover such procedures, if the cells, tissues or organs concerned have been obtained through _______________ or coercion of, or payment to, the donor or the next of kin of a deceased donor."