instruction:
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).
question:
Abstract: The chemotactic activity of human C5a des Arg is enhanced significantly by an anionic polypeptide (cochemotaxin) in normal human serum and plasma. We have found that the cochemotaxin attaches to the oligosaccharide chain of native C5a des Arg to form a complex with potent chemotactic activity for human polymorphonuclear leukocytes. Although capable of enhancing the chemotactic activity of native C5a des Arg, the cochemotaxin had no effect on the chemotactic activity of either deglycosylated C5a des Arg, native C5a, or N-formyl-methionyl-leucyl-phenylalanine. Of the known components of the oligosaccharide chain, only sialic acid prevented enhancement by the cochemotaxin of the chemotactic activity exhibited by native C5a des Arg. Sialic acid also prevented the formation of C5a des Arg-cochemotaxin complexes, detected by acid polyacrylamide gel electrophoresis, molecular sieve chromatography on polyacrylamide gels, and sucrose density gradient ultracentrifugation.
Which is the apt title for the abstract? option1: Attachment of human C5a des Arg to its cochemotaxin is required for maximum expression of chemotactic activity. option2: Appendectomy and the risk of tubal infertility.
answer:
Attachment of human C5a des Arg to its cochemotaxin is required for maximum expression of chemotactic activity.

question:
Abstract: The authors describe four cases of subependymoma studied with computed tomography (CT) and review 18 previously reported cases in an attempt to define the most characteristic CT presentation of this rare, benign tumor. Subependymoma usually appears as an isodense, or even hypodense, intraventricular tumor on plain CT scan and shows minimal or no enhancement in postcontrast studies. Differential diagnosis between subependymoma and the more malignant true ependymoma is difficult, particularly when the tumor occurs in the posterior fossa. Recognition of subependymoma should prompt the surgeon to attempt radical tumor removal because it can be achieved without sacrificing contiguous tissue and carries a good prognosis.
Which is the apt title for the abstract? option1: Symptomatic subependymoma: report of four new cases studied with computed tomography and review of the literature. option2: Biliary stricture dilatation: multicenter review of clinical management in 73 patients [letter]
answer:
Symptomatic subependymoma: report of four new cases studied with computed tomography and review of the literature.

question:
Abstract: Pediatric residency training programs were surveyed to assess current methods of educating house staff to manage pediatric cardiopulmonary resuscitations. Of the 155 programs responding, 96% provide Basic Life Support training, while 79% offer Advanced Cardiac Life Support training, but only 30% provide ongoing education in the form of mock arrests. In general, the availability of the various forms of resuscitation management instruction was not related to either program size or institution needs. The system of training pediatric residents to manage pediatric cardiopulmonary resuscitations at The Johns Hopkins Hospital is outlined.
Which is the apt title for the abstract? option1: Current methods of training residents to manage pediatric cardiopulmonary arrests. option2: Acoustic schwannoma presenting as subarachnoid hemorrhage due to ruptured contact aneurysm.
answer:
Current methods of training residents to manage pediatric cardiopulmonary arrests.