Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

[EX Q]: Abstract: The ability of extracranial-intracranial bypass surgery to alter favorably the natural history of ischemic cerebrovascular disease remains in question. A recently completed prospective randomized multicenter cooperative trial failed to confirm the hypothesis that the procedure prevents further cerebral ischemia in patients with atherosclerotic internal carotid artery or middle cerebral artery disease. We analyze findings of the study in detail, including possible effects on the natural history of the disease beyond the immediate perioperative period. Potential sources of bias that may have unpredictably affected the study are discussed. These include observational bias (patient and therapist not blinded), "randomization-to-treatment" bias (high morbidity after randomization but before operation), and "prerandomization" or allocation bias (patients in the study representing a selected sample of the population with cerebrovascular disease). The extensive analysis of secondary subgroups with small numbers of patients is discussed in light of the statistical methods used. Two particular classes of patients not addressed in the study who might benefit from the procedure are defined. They are patients failing the best available medical therapy and patients with clearly documented hemodynamic compromise. Possible indications for bypass surgery are suggested for the various lesions in light of the trial and of recent reports on the natural history and pathophysiology of ischemic cerebrovascular disease. Selected cases illustrating these indications are presented.
[EX A]: Extracranial-intracranial bypass surgery: a critical analysis in light of the International Cooperative Study.

[EX Q]: Abstract: A review of 77 patients with traumatic central cord syndrome revealed that atypical variations are more common than the existing literature suggests and that these may be seen in a wide variety of acute injuries to the cervical spine. In general the outcome is good; a favourable prognosis on admission is suggested by good hand function, hyperpathia, Lhermitte's sign and normal perianal sensation. The study has highlighted the value of regular muscle charting and has cast doubt on previous neuroanatomical assumptions about the syndrome.
[EX A]: A reappraisal of acute traumatic central cord syndrome.

[EX Q]: Abstract: Basic research has revealed that hydrophobic residues increased on the molecular surface of the denatured IgG and that the denatured proteins in the plasma can be removed by several sorbents of different amino acids bonded from polyvinylalcohol hydroxide residue with a covalent bond. Thus, an artificial reticulo-endothelial system was developed to supplement the human reticulo-endothelial system (RES) by removing denatured proteins from the patient's plasma. Clinically, angiitis and Raynaud's phenomenon associated with collagen disease such as systemic lupus erythematosus were remarkably reduced following a series of ARES treatments. The proteins adsorbed on the ARES were analyzed by two-dimensional electrophoresis. Virtually no albumin was detected, and IgG (constant isoelectric point), IgM, IgA, IgA dimer, C3, C4, fibrinogen and other unidentified spots were found in the elute from the ARES column.
[EX A]:
Removal of denatured proteins with artificial reticulo-endothelial system (ARES).