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).

Input: Consider Input: Abstract: Bilateral optic atrophy is reported in two patients who, although they were long-standing users of the leaves of Catha edulis, had chewed larger quantities than usual. Since the leaves of this plant are used widely throughout its native area as the source of a mildly stimulant narcotic, the effect in these cases may be an idiosyncratic reaction to an unusually large dose.
Which is the apt title for the abstract? option1: The presumed neurotoxic effects of Catha edulis--an exotic plant now available in the United Kingdom. option2: Assessment of left ventricular diastolic function: comparison of Doppler echocardiography and gated blood pool scintigraphy [published erratum appears in J Am Coll Cardiol 1987 May;9(5):1199]

Output: The presumed neurotoxic effects of Catha edulis--an exotic plant now available in the United Kingdom.

Input: Consider Input: Abstract: In principle, azoospermia has two explanations: occlusion of the duct system and serious dysfunction of the testicular parenchyma. Some cases of duct occlusion are suitable for reconstructive surgery. The authors describe a reconstructive technique based on full mobilization of a single loop of the epididymal duct as caudally as possible with two-layer side-to-end anastomosis to the vas deferens. To ensure follow-up evaluation of each anastomosis, unilateral anastomosis was done primarily. In a few cases, cross-over anastomosis was necessary. In cases of reoperation, if possible, this was performed on the same side. When the epididymal duct system was found empty, the contralateral epididymis was explored. Patients with postoperative oligozoospermia were offered a supplementary contralateral operation. From 1980 to 1984, 41 patients underwent epididymovasostomy. At follow-up evaluation, 35 (85%) presented sperms in repeated tests. Fifteen of these patients (37%) have fathered children. Patients with postoperative normospermia and no antisperm antibodies had an excellent fertility prognosis. The single-loop dissection technique provides anatomic specificity and a high percentage of patent anastomoses and does not interfere with the possibilities of reoperation.
Which is the apt title for the abstract? option1: Microsurgical epididymovasostomy in the treatment of occlusive azoospermia. option2: Long-term evaluation of training residents in clinical teaching skills.

Output: Microsurgical epididymovasostomy in the treatment of occlusive azoospermia.

Input: Consider Input: Abstract: Severe aortic regurgitation developed in three patients after aortic valve replacement within six months due to long sutures prolapsing across the "annulus" of Bjork-Shiley prosthesis. At reoperation the offending sutures were trimmed or tucked back to the aortic wall to eliminate aortic regurgitation. Prolapse of unravelled knots may be the likely cause. Everting the sewing skirt during the first replacement may prevent this complication.
Which is the apt title for the abstract? option1: Bjork-Shiley valve malfunction by prolapsed sutures. option2: Long-term stabilization in the incus interposition technique.
Output: Bjork-Shiley valve malfunction by prolapsed sutures.