Task: Answer Verification
Input (English): Question: Does occult H. pylori infection partially explain 'false-positive ' results of ( 13 ) C-urea breath test?
Answer: UBiT suffers from a high rate of false-positive results and sub-optimal specificity, and the protocol skipping citric acid pre-treatment should be revised; however, low-density 'occult' H. pylori infection that was undetectable by conventional tests accounted for around 25% of the 'false-positive' results.
Output (English): yes