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).

Example Input: Abstract: Rates of superoxide (SA) generation by blood monocytes stimulated ex vivo were studied before and during corticosteroid treatment of rheumatoid arthritis (RA) patients, in control patients and in healthy controls. The direct effect on stimulated SA production of pre-incubating cells with prednisolone in vitro was also studied. Significant inhibition of monocyte SA output stimulated with IgG-treated zymosan (ITZ) and fluoride ion (F), but not serum-treated zymosan (STZ) was demonstrated following steroid therapy in RA. No inhibitory effect of prednisolone could be demonstrated in vitro, using ITZ, STZ and F as stimuli. Our data on blood monocyte yields, size and cytochemistry suggest that the in vivo effect is due to a shift in blood monocyte traffic.
Which is the apt title for the abstract? option1: Effect of corticosteroid therapy on blood monocyte superoxide generation in rheumatoid arthritis: studies in vitro and ex vivo. option2: Percutaneous coronary laser thermal angioplasty.
Example Output: Effect of corticosteroid therapy on blood monocyte superoxide generation in rheumatoid arthritis: studies in vitro and ex vivo.

Example Input: Abstract: Of 68 patients with unclippable aneurysms treated by proximal artery occlusion with detachable balloons, permanent occlusion was achieved in 65; of these patients, 37 had carotid artery aneurysms below the origin of the ophthalmic artery, 21 had aneurysms arising from the supraclinoid portion of the carotid artery, six had basilar trunk aneurysms, and one had a distal vertebral aneurysm. Examination for treatment selection included assessment of the circle of Willis by compression angiography and xenon blood flow studies, with the ultimate evaluation being test occlusion under systemic heparinization with the balloon temporarily placed in the desired position. Of 67 patients who underwent a formal occlusion test, eight with carotid artery aneurysms did not initially tolerate the occlusion test, and ischemic signs disappeared instantaneously with deflation and removal of the balloon. During test occlusion, two additional patients had ischemic events that proved to be embolic; these reversed immediately upon balloon deflation. Of the 65 patients in whom permanent occlusion was effected by detachable balloon, there were nine instances of delayed cerebral events. One of these was a seizure leading to respiratory arrest and resuscitation 3 days following occlusion in a patient who had presented with seizures. The other eight cases were delayed ischemic events; seven were completely reversed and one patient had residual weakness in one leg (1.5% permanent morbidity). Extracranial-intracranial bypass procedures were performed in 25 of the 65 cases. All aneurysms of the carotid artery below the level of the ophthalmic artery presented angiographic proof of complete thrombosis. Ten of 21 aneurysms arising from the supraclinoid portion of the carotid artery were completely thrombosed by proximal occlusion alone, without additional trapping procedures. Similarly, in three of six basilar trunk aneurysms, proximal occlusion alone initiated complete aneurysm thrombosis without trapping. The conclusion is that proximal balloon occlusion for unclippable cerebral aneurysms is a convenient, safe, and effective way of producing arterial occlusion in these cases.
Which is the apt title for the abstract? option1: Use of detachable balloons for proximal artery occlusion in the treatment of unclippable cerebral aneurysms. option2: Breast cancer risk in relation to early oral contraceptive use.
Example Output: Use of detachable balloons for proximal artery occlusion in the treatment of unclippable cerebral aneurysms.

Example Input: Abstract: TBT is a new technique that by use of a balloon catheter technique in a fashion similar to that of balloon angioplasty allows reestablishment of tubal patency in selected cases of tubal occlusion. The case presented here describes the first transcervical dilatation and recanalization of a proximally occluded fallopian tube in a patient with infertility.
Which is the apt title for the abstract? option1: Transcervical balloon tuboplasty. option2: Federal policy for biomedical and behavioral research [editorial]
Example Output:
Transcervical balloon tuboplasty.