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: Methods for endoscopic retrograde cholangiography (ERC) and endoscopic papillotomy (EPT) in patients with Billroth-II operations are described, and experience with their use during the last four years (since 1980) is presented. Endoscopic retrograde cholangiopancreatography was successful in 134 of 147 patients (92%) and endoscopic papillotomy was successful in 46 of 50 patients. The described methods were used in two different hospitals by two different endoscopists and there was no difference in the results. We conclude that patients with a Billroth-II operation may undergo endoscopic diagnostic as well as therapeutic procedures with a high rate of success, with similar results as in ordinary patients and with no greater risk of complications. 
 Which is the apt title for the abstract? option1: Endoscopic retrograde cholangiography and endoscopic papillotomy in patients with a previous Billroth-II resection. option2: Leads from the MMWR. Congenital syphilis--United States, 1983-1985.

Answer: Endoscopic retrograde cholangiography and endoscopic papillotomy in patients with a previous Billroth-II resection.


Question: Abstract: Severe aortic regurgitation developed in three patients after aortic valve replacement within six months due to long sutures prolapsing across the "annulus" of Bjork-Shiley prosthesis. At reoperation the offending sutures were trimmed or tucked back to the aortic wall to eliminate aortic regurgitation. Prolapse of unravelled knots may be the likely cause. Everting the sewing skirt during the first replacement may prevent this complication. 
 Which is the apt title for the abstract? option1: Bjork-Shiley valve malfunction by prolapsed sutures. option2: Long-term stabilization in the incus interposition technique.

Answer: Bjork-Shiley valve malfunction by prolapsed sutures.


Question: Abstract: Parts of the United Kingdom have the highest incidence, prevalence and mortality rates for multiple sclerosis in the world. Although methods of ascertainment are not standardised, regional differences and changes with time are present for each of these statistics. Mortality has declined, whereas prevalence and hospital discharge rates have increased owing in part to the improved survival but also to better case ascertainment. The gradient in prevalence seen between Southern England (63/10(5)), Northern England and Northern Ireland (76-79/10(5)), Wales (c. 113/10(5)), North-East Scotland (155/10(5)) and the Orkneys (258/10(5)) can in part be attributed to varying methods of ascertainment but correlates with regional differences in the frequency of HLA-DR2 in normal individuals (21-50%). However no HLA-DR2 association is observed in parts of Scotland, where the prevalence is the highest in the United Kingdom, because HLA-DR2 and linked genes occur in up to 50% of the normal population from these areas. If the aetiology of multiple sclerosis is multifactorial the frequency of the disease will increase where susceptibility genes are common because the probability of concurrence of the remaining critical events is high; conversely when each aetiological agent is infrequent the chance of them all occurring in the same individual and therefore incidence of the disease are both lower. The fall in incidence observed in the Orkney Islands, possibly reflecting decline in an exogenous agent interacting with susceptibility factors, is consistent with this multifactorial hypothesis. 
 Which is the apt title for the abstract? option1: The distribution of multiple sclerosis in the United Kingdom. option2: Supra- and infratentorial arteriovenous malformations with an aneurysmal dilatation: a case report.

Answer:
The distribution of multiple sclerosis in the United Kingdom.


