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).

Ex Input:
Abstract: The relationship between air flow at 38 degrees C and area colour change on a flexible liquid crystal film was found to be virtually linear between the values of 1 and 31 min-1 cm-2. This value of flow per unit area corresponded to values expected at the level of the nostril during quiet breathing. A series of 6 subjects were asked to breathe over a flexible liquid crystal film regularly during the day and the area of colour change produced by flow from each nostril was examined. Four subjects showed a regular change in relative flow through each nostril whilst 2 subjects showed a constant flow through each nostril. This simple and non-invasive technique provides a method of examining the nasal cycle in adults and children in health and disease.
Which is the apt title for the abstract? option1: A non-invasive method of demonstrating the nasal cycle using flexible liquid crystal thermography. option2: Recovery of human neutrophils from complement attack: removal of the membrane attack complex by endocytosis and exocytosis.

Ex Output:
A non-invasive method of demonstrating the nasal cycle using flexible liquid crystal thermography.

Ex Input:
Abstract: A prospective study of patients with symptoms of gastroesophageal reflux was undertaken to determine the prevalence of Barrett's esophagus and reevaluate the diagnostic approach necessary to detect this complication. Endoscopy with mucosal biopsy was performed in 97 subjects. Twelve (12.4%) were found to have Barrett's esophagus. The sensitivity and specificity of the endoscopic and radiologic examinations for Barrett's esophagus were prospectively evaluated. Endoscopy (92%) was significantly more sensitive than radiology (24%) in detecting Barrett's esophagus (p less than 0.001). The frequency and severity of reflux symptoms among patients determined to have Barrett's esophagus, reflux esophagitis, or normal esophageal biopsies were quantitatively similar in all three groups, except for significantly greater daytime heartburn in those with reflux esophagitis (p less than 0.01). These data indicate that Barrett's esophagus complicates gastroesophageal reflux more often than previously believed.
Which is the apt title for the abstract? option1: Barrett's esophagus. A prevalent, occult complication of gastroesophageal reflux disease. option2: Assessment of a scheme for prioritizing inorganic toxicants by using signs-and-symptoms analysis.

Ex Output:
Barrett's esophagus. A prevalent, occult complication of gastroesophageal reflux disease.

Ex Input:
Abstract: Serum estradiol, estriol, progesterone, PRL, and hCG concentrations were measured at 4-week intervals in 40 pregnant women who chronically abused alcohol and in 20 abstinent pregnant women. Sixteen alcohol users gave birth to infants with the fetal alcohol syndrome (FAS), whereas the remaining 24 infants of alcohol users and all infants of the abstinent women were healthy. The women whose infants had the FAS had decreased estradiol and estriol levels throughout pregnancy. Progesterone levels also tended to be low. In contrast, the alcohol users had increased PRL levels during the 16-24th weeks of pregnancy compared with those in the abstinent women, but this rise was not related to the FAS. The concentrations of hCG fluctuated widely, without any consistent difference between alcohol users and abstinent women. Thus, heavy maternal abuse of alcohol resulting in FAS is accompanied, primarily or secondarily, by reduced estrogen concentrations throughout pregnancy and increased PRL levels during the 16-24th weeks of pregnancy.
Which is the apt title for the abstract? option1: Estradiol, estriol, progesterone, prolactin, and human chorionic gonadotropin in pregnant women with alcohol abuse. option2: Sodium channel kinetics in normal and denervated rabbit muscle membrane.

Ex Output:
Estradiol, estriol, progesterone, prolactin, and human chorionic gonadotropin in pregnant women with alcohol abuse.