Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
--------
Question: Abstract: From February 1984 to March 1986, 28 patients underwent a new technique of coarctation repair. This technique consists of a complete mobilization of the left subclavian artery extended to the origin of its first branches. The aorta need not be extensively mobilized and the intercostal arteries are individually controlled with snares. After all the proper clamping, the left subclavian artery is detached from the aorta at its origin and is opened longitudinally on its posterior aspect. The anterior wall of the aorta is then incised, beginning with the opening at the origin of the left subclavian artery and extending distally to the descending aorta 12 to 15 mm past the coarctation. The coarctation membrane is excised and the ductus is ligated and divided. The opened left subclavian artery, now forming a flap, is pulled down and sutured to the edges of the aorta, widening the coarctation site and also preserving the blood flow to the left arm. The ages of the patients ranged from 2 months to 25 years (mean 4.24 +/- 4.9 years) and their weights ranged from 2.8 to 52 kg (mean: 14.8 +/- 10.0 kg). There were no hospital deaths and the mean follow-up was 9.6 months (+/- 4.9 months). Recatheterization of four patients from 4 to 12 months postoperatively showed adequate correction and strongly suggested normal growth of the aorta at the site of coarctation, as well as preservation of the blood flow through the left subclavian artery. Doppler measurements showed normal flow to the left arm and no gradients through the isthmic area. Our experience indicates that this technique is not only feasible but is the procedure of choice in most cases of discrete isthmic coarctation and in some cases of long narrowing of the isthmus in patients with a wide range of ages and weights.
Which is the apt title for the abstract? option1: A new technique for repair of aortic coarctation. Subclavian flap aortoplasty with preservation of arterial blood flow to the left arm. option2: Target-specific nerve regeneration through a nerve guide in the rat.

Answer: A new technique for repair of aortic coarctation. Subclavian flap aortoplasty with preservation of arterial blood flow to the left arm.

Question: Abstract: Aneurysms of the extracranial vertebral artery are rare because of the protection afforded by the bony canal, and the literature contains only a few limited reports on this subject. In the view of its rarity, we present the case of a 20-year-old soldier with a traumatic aneurysm of the vertebral artery at the C-2 level. Because of occlusion of the ipsilateral carotid artery, reconstruction of the vertebral artery by autogenous vein graft was undertaken through a posterior approach; because of inadequate mobilization of the artery, continuity was preserved using aneurysmorrhaphy. The literature is reviewed, and the various treatments are discussed.
Which is the apt title for the abstract? option1: Traumatic aneurysm of the extracranial vertebral artery. option2: Hypervascular hepatic metastases: CT evaluation.

Answer: Traumatic aneurysm of the extracranial vertebral artery.

Question: Abstract: The Wiskott-Aldrich Syndrome (WAS) in humans has a number of similarities to the immunodeficiencies found in CBA/N mice, including X-chromosome-linked inheritance, inability to produce antibodies to various carbohydrate antigens, susceptibility to various bacterial infections, and an imbalance in B lymphocyte subpopulations. Moreover, in both man and mice, IgG antibodies to polysaccharides are predominantly, but not exclusively, restricted to a single IgG subclass--IgG2 in man, and IgG3 in the mouse. Because CBA/N mice have a deficiency of IgG3 antibodies and because human IgG2 subclass deficiencies have been generally associated with inability to produce antibodies to carbohydrate antigens, it would seem likely that patients with WAS would have greatly reduced levels of IgG2. Quite to the contrary, the data presented here demonstrate that WAS patients have normal levels of the different IgG subclasses, including IgG2. Thus, inability to produce antibodies to carbohydrates is not always associated with IgG2 subclass deficiency.
Which is the apt title for the abstract? option1: Patients with Wiskott-Aldrich syndrome have normal IgG2 levels. option2: The structure of beta-lactoglobulin and its similarity to plasma retinol-binding protein.

Answer:
Patients with Wiskott-Aldrich syndrome have normal IgG2 levels.