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).

Abstract: Artificial ventilation is a cornerstone of basic life support-cardiopulmonary resuscitation (BLS-CPR). Recent data corroborate clinical studies performed in the 1950s and 1960s, suggesting a need to change the present American Heart Association standards for artificial ventilation. These studies show that gastric insufflation followed by regurgitation and pulmonary aspiration are a major hazard of artificial ventilation with an unprotected airway. Present BLS-CPR standards require that ventilation be performed rapidly between external chest compressions or with incremental breaths. These methods of ventilation predispose the victim to gastric insufflation. Alternative methods of ventilation with longer inspiratory time and thus lower flow rate and peak inspiratory pressure are suggested. Additionally, rescue personnel, particularly EMTs and paramedics, should be taught how to apply cricoid pressure to prevent gastric insufflation in victims with an unprotected airway.
Which is the apt title for the abstract? option1: Alternative methods of ventilation during respiratory and cardiac arrest. option2: Chromosomal location of the genes encoding complement components C5 and factor H in the mouse.
Alternative methods of ventilation during respiratory and cardiac arrest.

Abstract: The effect of prolonged osmotic stimulation on the oxytocin (OT) mRNA levels of OT-producing neurons was investigated in separate hypothalamic nuclei of the rat. After drinking 2% NaCl for 2 weeks, a 2-fold increase in the OT mRNA content was found by Northern blot analysis of microdissected supraoptic nucleus (SON) and paraventricular nucleus (PVN). The same samples showed a similar change in vasopressin (VP) mRNA levels. This treatment resulted in a 70% depletion of both OT and VP from the neurointermediate lobe of the pituitary gland and a marked increase in OT and VP plasma levels. Analysis of the OT mRNA concentration by quantitative in situ hybridization showed that the SON, PVN, and anterior commissural nucleus responded similarly, with a 1.5-fold increase in OT mRNA after 7 days of osmotic stimulation. These results demonstrate that OT gene expression in the magnocellular neurons of the SON, PVN, and anterior commissural nucleus is sensitive to this osmotic stimulus, as is the VP gene of magnocellular neurons in the SON and PVN. The responsiveness of OT-producing neurons may point to a role for OT in the regulation of water and electrolyte balance.
Which is the apt title for the abstract? option1: Oxytocin gene expression in discrete hypothalamic magnocellular cell groups is stimulated by prolonged salt loading. option2: Locus of control as predictor of compliance and outcome in treatment of encopresis.
Oxytocin gene expression in discrete hypothalamic magnocellular cell groups is stimulated by prolonged salt loading.

Abstract: The clinical, radiographic and histologic features of sixty-one popliteal aneurysms in 36 patients are reviewed. Twenty-seven aneurysms were thrombosed and presented with an acutely ischaemic limb or the sudden onset of severe claudication. Thirty-four patent aneurysms presented with either ischaemic ulceration or claudication due to tibial artery disease or were asymptomatic with normal distal pulses. Thrombosis made reconstruction difficult and at times required a femoro-tibial graft. In others reconstruction was not possible leading to amputation either as primary treatment or following failed revascularization. In patent aneurysms one or more tibial arteries were frequently occluded. It is postulated that obliterative atheromatous disease of the tibial vessels and the slow flow through the aneurysmal vessels is responsible for the high incidence of thrombosis, poor graft patency and a high amputation rate.
Which is the apt title for the abstract? option1: The significance of tibial artery disease in the management of popliteal aneurysms. option2: Medical software regulation: why now? [editorial]
The significance of tibial artery disease in the management of popliteal aneurysms.