Neurosurgeon Sergio Canavero proposed the HEAVEN procedure - i.e. head anastomosis venture - several years ago, and has received approval from the relevant regulatory bodies to perform this body-head transplant (BHT) in China. The BHT procedure involves attaching the donor body (D) to the head of the recipient (R), and discarding the body of R and head of D. Canavero's proposed procedure will be incredibly difficult from a medical standpoint.