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: This article stresses the fact that the pediatric patient who presents with back pain is very different from the adult patient with the same complaint. A child is much less likely to complain of symptoms when there is no organic cause for the complaint, and therefore his or her status should be evaluated carefully. When an immediate cause is not obvious, repeated examination should be performed because time may reveal a cause of the symptoms.
Which is the apt title for the abstract? option1: Evaluating the child with back pain. option2: Nutrition and cancer II.

Output: Evaluating the child with back pain.

Input: Consider Input: Abstract: Patients with essential hypernatremia maintain urinary concentrating ability despite plasma hyperosmolality and low plasma vasopressin concentrations. We investigated renal sensitivity to ultralow dose vasopressin infusions in two patients with a syndrome of hypodipsia, hypernatremia with selective osmoreceptor dysfunction, early puberty, and aggressive behavior. The patients were water loaded until a hypotonic diuresis was established. Vasopressin was infused in stepwise increments from 0.4-12 fmol/kg X min. Both patients had increased renal sensitivity to vasopressin, achieving negative free water clearance at infusion rates of 0.4 and 4 fmol/kg X min (normal greater than or equal to 6). Treatment for 3 months with 1-desamino-8-D-arginine vasopressin (DDAVP) led to an improvement in behavior and the reporting, for the first time, of a sensation of thirst. After DDAVP therapy both patients had a reduction of their renal sensitivity to infused vasopressin. We conclude that untreated patients with essential hypernatremia have increased renal sensitivity to vasopressin which is reduced by DDAVP administration.
Which is the apt title for the abstract? option1: Increased renal sensitivity to vasopressin in two patients with essential hypernatremia. option2: AAEE minimonograph #25: Single-fiber electromyography in myasthenia gravis.

Output: Increased renal sensitivity to vasopressin in two patients with essential hypernatremia.

Input: Consider Input: Abstract: The effectiveness of neostigmine 0.07 mg kg-1 and edrophonium 0.8 mg kg-1 as antagonists of profound neuromuscular blockade induced by vecuronium 0.1 mg kg-1 or atracurium 0.5 mg kg-1 was studied in 59 healthy patients. The antagonists were administered 5 min after total ablation of the twitch response and the end-point of recovery was a train-of-four ratio of 70%. In 30 patients given vecuronium the mean time to reach this point (duration TOF70) was 66.7 min in the control group (no antagonist), 43.5 min in the group given neostigmine and 59.8 min in the group given edrophonium. The duration TOF70 was shorter in the neostigmine group than in the control (P less than 0.01) and edrophonium (P less than 0.01) groups. The duration TOF70 did not differ from control in the edrophonium group. In 29 patients given atracurium, the durations TOF70 were 66.4, 44.1 and 54.9 min in the control, neostigmine and edrophonium groups, respectively. The durations TOF70 in the neostigmine (P less than 0.01) and edrophonium (P less than 0.01), groups were shorter than control. The duration TOF70 of the neostigmine group was shorter than in the edrophonium group (P less than 0.01). These results show that profound neuromuscular blockade cannot be rapidly antagonized by either of these two agents, but if reversal is required under these circumstances, neostigmine would be the more effective drug.
Which is the apt title for the abstract? option1: Antagonism of profound neuromuscular blockade induced by vecuronium or atracurium. Comparison of neostigmine with edrophonium. option2: The diagnosis and treatment of chancroid.
Output: Antagonism of profound neuromuscular blockade induced by vecuronium or atracurium. Comparison of neostigmine with edrophonium.