se and altered states -- Surgery-related and other issues -- Neurosurgery, ophthalmology, ENT -- Neurosurgery -- Ophthalmology -- Ear, nose, and throat -- Other surgical subspecialties -- Obstetrics and gynecology -- General surgery -- Urologic surgery -- Orthopedic surgery -- Special topics -- Postanesthesia care unit -- Diganostic or therapeutic intervention -- Medicolegal aspects. 1.