Clinical-therapeutic and recuperators complex aspects in a chronic ethanol-consuming patient with incomplete AIS/Frankel D tetraplegia after cervical SCI on the background of ankylosing spondylitis, with C6 transosus fracture operated (by mixed osteosynthesis) and immobilized in the halo-vest by falling from its own level and the posterior cerebral artery ischemic stroke (possibly by vertebral artery dissection