TASK DEFINITION: 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.
PROBLEM: Diarrhea is the third leading infectious cause of death worldwide and is estimated to be responsible for approximately 2 million deaths a year. While many infectious causes of diarrhea have been established, approximately 40% of all diarrhea cases are of unknown etiology. In an effort to identify novel viruses that may be causal agents of diarrhea, we used high throughput mass sequencing to analyze stool samples collected from patients with acute diarrhea.', "Sequences with limited similarity to known picornaviruses were detected in a stool sample collected in Australia from a child with acute diarrhea. Using a combination of mass sequencing, RT-PCR, 5' RACE and 3' RACE, a 6383 bp fragment of the viral genome was sequenced. Phylogenetic analysis demonstrated that this virus was highly divergent from, but most closely related to, members of the genus Kobuvirus. We have tentatively named this novel virus klassevirus 1. We also detected klassevirus 1 by RT-PCR in a diarrhea specimen collected from a patient in St. Louis, United States as well as in untreated sewage collected in Barcelona, Spain.

SOLUTION: Is klassevirus 1 , a previously undescribed member of the family Picornaviridae , globally widespread?

PROBLEM: Pulmonary hypertension (PH) is prognosti- cally important in chronic obstructive pulmonary disease (COPD). Since PH only weakly correlates with hypoxemia, other factors must play a role.', 'To investigate whether polymorphisms of the serotonin transporter (5HTT), serotonin-2a receptor (5HTR2a) and endothelial nitric oxide synthetase (eNOS) are related to PH in COPD.', 'In 59 COPD patients who underwent right heart catheterization, 6-min walking distance, NYHA functional class, pulmonary function tests, blood gases and 5HTT, 5HTR2a and eNOS (4ab and T298C) polymorphisms were determined.', 'Forty-nine COPD patients in NYHA functional class III-IV were included. Ten were excluded due to comorbid causes of PH (mainly chronic thromboembolic). PH (mPAP > or =25 mm Hg) was present in 55% and usually mild, but out of proportion (mPAP > or =40 mm Hg) in 12%. Patients with PH had significantly higher frequencies of the 5HTT-L-allele (52%) compared to individuals without PH (36%), and LL homozygote patients had more severe PH. In patients with out-of-proportion PH, the L-allelic frequency was even 75%. We found no association of 5HTR2a and eNOS polymorphism with PH in COPD.

SOLUTION: Are genetic polymorphisms of the serotonin transporter , but not the 2a receptor or nitric oxide synthetase , associated with pulmonary hypertension in chronic obstructive pulmonary disease?

PROBLEM: To determine the incidence of microvascular invasion in prostatic carcinoma and its correlation with other prognostic factors.', 'Evaluation of the frequency and extent of microvascular invasion by routine light microscopy in 210 whole-mounted radical prostatectomies with cancer.', 'Microvascular invasion was identified in 111 (53%) of 210 specimens. Focal microvascular invasion (involvement of fewer than three high-power fields) was present in 42 cases (20%); extensive microvascular invasion (involvement of three or more high-power fields) was present in 69 cases (33%). Capsular perforation was present in 43% and 62% of cases with focal and extensive microvascular invasion, respectively. Seminal vesical involvement was observed in 23% and 47% of cases with focal and extensive microvascular invasion, respectively. Lymph node metastases were only observed in cases with microvascular invasion and were present in 7% and 23% of cases with focal and extensive invasion, respectively. There was also a strong positive correlation of microvascular invasion with surgical margin status, Gleason score, and cancer volume. Tumors ranged in volume from 0.14 cc to 47.25 cc (mean, 9.09 cc), and the volume in cases without microvascular invasion was lower than in those with invasion (mean, 5.4 cc and 12.7 cc, respectively); also, the volume in cases with focal invasion was lower than in those with extensive invasion (mean, 9.4 cc and 16.1 cc, respectively).

SOLUTION:
Does microvascular invasion in prostate cancer correlate with pathologic stage?