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: Eight cases of suicidal isoniazid overdose by Cambodian refugees are reviewed. In all patients generalized seizures and metabolic acidosis developed. Treatment included supportive measures and intravenous pyridoxine hydrochloride. There were no deaths. Psychiatric evaluation of each patient revealed usual and extraordinary life and social adjustment stresses. Indochinese immigrants are a subpopulation at risk for isoniazid overdose. 
 Which is the apt title for the abstract? option1: Isoniazid overdose in the Cambodian population of Olmsted County, Minnesota. option2: Nuclear accident at Chernobyl: implications for pediatricians [letter]
Example Output: Isoniazid overdose in the Cambodian population of Olmsted County, Minnesota.

Example Input: Abstract: We undertook a study of the separate and combined effects of age and sex on the pulsatile pattern of GH secretion. The 24-h secretory profile of GH was generated by 20-min sampling in 10 young women (aged 18-33 yr), 10 young men (aged 18-33 yr), 8 postmenopausal women (aged greater than 55 yr), and 8 older men (aged greater than 55 yr). A computer-assisted pulse analysis program was used to assess both total GH secretion, as reflected in the 24-h integrated GH concentration (IGHC), and pulsatile secretion, as denoted by pulse frequency, duration, amplitude, and the fraction of GH secreted in pulses during the 24-h period (FGHP). IGHC was significantly greater in women than in men (P less than 0.025) and greater in the young than in the old (P less than 0.003). The mean pulse amplitude, duration, and FGHP were each greater in the young (P less than 0.006, P less than 0.03, and P less than 0.0001, respectively), but not significantly different between the sexes. The mean pulse frequency was not affected by sex or age. The serum concentration of free estradiol, but not free testosterone, correlated with IGHC (r = 0.46; P less than 0.005), pulse amplitude (r = 0.53; P less than 0.001), and FGHP (r = 0.59; P less than 0.0002). After correcting for the effects of estradiol, neither sex nor age influenced IGHC or mean pulse amplitude, while the effect of age on FGHP was reduced from 81% to 29%. Of the indices of GH secretion, FGHP had the strongest correlation (r = 0.43; P less than 0.006) with somatomedin-C. Somatomedin-C declined significantly with age in both sexes. Our results indicate that sex and age have independent and interrelated effects on GH secretion. These effects can be largely accounted for by corresponding variations in endogenous estradiol levels. These observations suggest an amplifying action of estradiol on the neuroendocrine regulation of pulsatile GH release. 
 Which is the apt title for the abstract? option1: Effects of sex and age on the 24-hour profile of growth hormone secretion in man: importance of endogenous estradiol concentrations. option2: Thalidomide neuropathy: an electrophysiologic study.
Example Output: Effects of sex and age on the 24-hour profile of growth hormone secretion in man: importance of endogenous estradiol concentrations.

Example Input: Abstract: Developmental changes and sexual differences in the lactotrope population were studied with a reverse hemolytic plaque assay for detection and measurement of PRL secretion from individual cells in conjunction with PRL immunocytochemistry (ICC). Pituitary glands from both sexes at different ages were monodispersed with 0.1% trypsin. Freshly dispersed cells were incubated in Cunningham chambers for measurement of the fraction of plaque-forming cells and the size of plaques formed, or attached to glass slides for measurement of the fraction of cells staining for PRL by ICC. The percentage of plaque-forming cells in both sexes gradually increased with age from about 5% of the total anterior pituitary cell population at 5 days of age to the adult levels of about 54% in the females at proestrus and about 37% in the males. Sexual differences in the percentage of plaque-forming cells were consistently seen at 40 days of age and thereafter. The mean size of plaques in both sexes also increased with age from about 1,100 microns 2 at 5 days of age to a peak level of about 15,600 microns 2 in the females at proestrus and about 6,700 microns 2 in the males at 60 days of age; then fell to the adult levels of about 5,500 microns 2 in the females at proestrus and about 3,200 microns 2 in males. Sexual differences first appeared at 40 days of age and were estrogen-dependent. The results from ICC closely matched those from the plaque assay, except at 5 days of age and in the adult males. At 5 days, the fraction of cells staining for PRL was twice that of cells forming plaques. In adult male rats there were about 47% immunostained PRL cells but only about 39% plaque-forming cells. This difference, however, disappeared after estrogen treatment. These results demonstrate that sexual differences in the lactotrope population develop around puberty in rats and appear to be estrogen dependent. 
 Which is the apt title for the abstract? option1: Postnatal development of pituitary lactotropes in the rat measured by reverse hemolytic plaque assay. option2: Comparison of left ventricular diastolic function as determined by nuclear cardiac probe, radionuclide angiography, and contrast cineangiography.
Example Output:
Postnatal development of pituitary lactotropes in the rat measured by reverse hemolytic plaque assay.

