Dr. Machado is President of the International Symposium on Brain Death and Disorders of Consciousness, President of the Cuban Society of Neurophysiology, and Senior Professor and Researcher at the Institute of Neurology and Neurosurgery, Havana, Cuba. Dr. Machado has spent over 20 years devoted to the topic of brain death and altered consciousness, authoring dozens of scientific papers and books, including most recently Brain Death: A Reappraisal - Dr. Machado collaborates only to confirm diagnoses of brain death OR other states of  disorders of consciousness.