Given a passage, construct a question on the basis of the information present in the passage. Construct the question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) it answer uses text phrases from the passage. Avoid creating questions that (i) can't be answered correctly without actually understanding the passage and (ii) uses the same words or phrases given in the passage.

Input: Consider Input: The tumor necrosis factor (TNF) gene is located within the highly polymorphic major histocompatibility complex region, exhibiting the -308 GA promoter region polymorphism and six microsatellites (TNFa-f) spanning the region nearby the TNF locus.', 'In the present study, we evaluated the frequency of -308 GA and TNFa-e polymorphisms and respective haplotypes (in chromosomal sequence: TNFd-TNFe-308GA-TNFc-TNFa-TNFb), in 222 patients with AIDS, 52 of whom exhibited cytomegalovirus retinitis, and in 202 healthy HIV-negative individuals.', 'TNF microsatellite and single nucleotide polymorphism typings were performed by PCR followed by polyacrylamide gel electrophoresis.', 'The TNF-308A allele and the 4-3-G-2-7-1 haplotype were associated with susceptibility to AIDS, whereas the TNFb4 allele and the 3-3-G-1-11-4 haplotype were associated with protection against AIDS development. The TNFc2 allele and the 4-1-G-2-2-1 haplotype, which contains the TNFc2 allele, were associated with cytomegalovirus retinitis.

Output: Are tumor necrosis factor region polymorphisms associated with AIDS and with cytomegalovirus retinitis?


Input: Consider Input: Embryonic-like stem cells (ELSCs) express embryonic stem cell-specific marker genes, such as SSEA-4, Oct-4 and Nanog, and can be induced to differentiate into cells of all 3 germ layers. Our preliminary data showed that ELSCs isolated from human bone marrow express multipotent antigen markers and differentiate into multinucleated myotube-like cells more efficiently than do mesenchymal stromal cells (MSCs) isolated from the same source. We investigated the therapeutic effect of ELSCs in dystrophin/utrophin double knock-out (dko) mice, one of the Duchenne muscular dystrophy animal models, by systemically transplanting them through tail-vein injection.', 'ELSCs and MSCs were both isolated from human bone marrow. Two months after equal amounts of ELSCs or MSCs were injected through tail-vein injection, we evaluated skeletal muscle motor function and serum creatine kinase activity and measured dystrophin expression by means of immunostaining, Western blotting and semi-quantitative reverse transcriptase-polymerase chain reaction.', 'ELSCs positive for Oct-4 and Nanog-3 expressed higher levels of SSEA-4, FZD-9 and CD105 and were induced to differentiate into myotube-like cells more efficiently than did MSCs in vitro. Transplantation of ELSCs through the tail vein improved motor function and decreased serum creatine kinase activity at 2 months after cell transplantation. In addition, dystrophin protein and messenger RNA were upregulated and the skeletal muscle histology was improved in these dko mice transplanted with ELSCs.

Output: Does systemic delivery of human bone marrow embryonic-like stem cells improve motor function of severely affected dystrophin/utrophin-deficient mice?


Input: Consider Input: To determine whether metabolic syndrome is an independent predictor of decline in mobility in an elderly community sample.', 'Biracial community-based prospective cohort study.', 'Urban and rural areas of central North Carolina.', 'One thousand two hundred twenty-nine older African Americans and whites, mean age 77.0, who were participants in the Duke Established Populations for Epidemiologic Studies of the Elderly.', 'Sociodemographic data and data on mobility (a subset of items from the Rosow-Breslau scale), depression (Center for Epidemiological Studies Depression Scale), self-report of medical conditions, body mass index, cognitive function (Short Portable Mental Status Questionnaire), blood pressure, height, and waist circumference. High-density lipoprotein cholesterol, triglycerides, and blood glucose were available from blood samples. Metabolic syndrome was calculated for subjects with complete data.', 'Twenty-nine percent of the sample met criteria for metabolic syndrome. In bivariate analyses, age, sex, race, education, cognitive impairment, depression, impairment in mobility, history of stroke and heart disease, and metabolic syndrome at baseline were associated with a decline in mobility 4 years later. Regression analysis controlling for the above variables demonstrated that metabolic syndrome persisted as an independent and highly significant predictor of decline in mobility.


Output: Does metabolic syndrome predict mobility decline in a community-based sample of older adults?