Given a passage with a context and an answer, 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.

Example Input: Context: To simultaneously study the effect of a selective cyclooxygenase-2 (COX-2) inhibitor and that of a classic non-steroidal anti-inflammatory drug (NSAID) on the expression of pro-inflammatory genes in the cartilage of patients with severe knee osteoarthritis (OA) and in cultured human OA chondrocytes.', 'A 3-month clinical trial was carried out on 30 patients with severe knee OA scheduled for knee replacement surgery. Patients were randomized into two groups: patients treated with celecoxib (CBX) and patients treated with aceclofenac (ACF). OA patients who did not want to be treated served as the control group. After surgery, cartilage was processed for molecular biology studies. We also employed cultured chondrocytes from different OA patients to examine NSAID effects on pro-inflammatory gene expression in cells stimulated with interleukin (IL)-1beta.', 'Both CBX and ACF inhibited COX-2, microsomal prostaglandin E synthase-1 (mPGES-1) and inducible nitric oxide synthase (iNOS) synthesis in the articular cartilage of OA patients. In cultured chondrocytes, both NSAID decreased COX-2 and mPGES-1 synthesis and prostaglandin E2 (PGE2) release induced by IL-1beta, while no effect was observed on nitric oxide or iNOS synthesis. In OA patients, only CBX decreased tumor necrosis factor alpha and IL-1beta expression in the cartilage, while both NSAID diminished IL-1beta induced cytokine synthesis in cultured OA chondrocytes.
Answer: Both NSAID diminished PGE2 release and induced a decrease in COX-2 and mPGES-1 synthesis in the cartilage from OA patients and in OA chondrocytes. These data suggest that prolonged therapy with PGE2 blocking agents decreases PGE2 production not only by direct inhibition of COX-2 activity, but also by down-regulating COX-2 and mPGES-1 synthesis in the cartilage. However, CBX and ACF seem to have a different anti-inflammatory profile in controlling pro-inflammatory gene expression in the cartilage.
Example Output: Does long-term NSAID treatment directly decrease COX-2 and mPGES-1 production in the articular cartilage of patients with osteoarthritis?

Example Input: Context: Blood oxygen level-dependent (BOLD) MRI has been effectively used to monitor changes in renal oxygenation. However, R2* (or T2*) is not specific to blood oxygenation and is dependent on other factors. This study investigates the use of a statistical model that takes these factors into account and maps BOLD MRI measurements to blood pO2.', "Spin echo and gradient echo images were obtained in six Sprague-Dawley rats and R2 and R2* maps were computed. Measurements were made at baseline, post-nitric oxide synthase inhibitor (L-NAME), and post-furosemide administration. A simulation of each region was performed to map R2' (computed as R2*-R2) to blood pO2.", 'At baseline, blood pO2 in the outer medulla was 30.5\u2009±\u20091.2 mmHg and 51.9\u2009±\u20095.2 mmHg in the cortex, in agreement with previous invasive studies. Blood pO2 was found to decrease within the outer medulla following L-NAME (P\u2009<\u20090.05) and increase after furosemide (P\u2009<\u20090.05). Blood pO2 in the cortex increased following furosemide (P\u2009<\u20090.05).
Answer: Model-derived blood pO2 is sensitive to pharmacological challenges, and baseline pO2 is comparable to literature values. Reporting pO2 instead of R2* could lead to a greater clinical impact of renal BOLD MRI and facilitate the identification of hypoxic regions. Magn Reson Med, 2016. © 2016 International Society for Magnetic Resonance in Medicine.
Example Output: Is bOLD quantified renal pO2 sensitive to pharmacological challenges in rats?

Example Input: Context: Postpartum haemorrhage (PPH) remains the leading cause of maternal morbidity and mortality worldwide. The main strategy for preventing PPH is the use of uterotonic drugs given prophylactically by skilled health workers. However, in settings where many women still deliver at home without skilled attendants, uterotonics are often inaccessible. In such cases, women and their caregivers need to recognize PPH promptly so, as to seek expert care. For this reason, it is important to understand how women and their caregivers recognize PPH, as well as the actions they undertake to prevent and treat PPH in home births. Such knowledge can also inform programs aiming to make uterotonics accessible at the community level.', 'Between April and June 2012, a phenomenological study was carried out in a rural Ugandan district involving 15 in-depth interviews. Respondents were purposively sampled and included six women who had delivered at home in the past year and nine traditional birth attendants (TBAs). The interviews explored how PPH was recognized, its perceived causes, and the practices that respondents used in order to prevent or treat it. Phenomenological descriptive methodology was used to analyse the data.', 'Bleeding after childbirth was considered to be a normal cleansing process, which if stopped or inhibited would lead to negative health consequences to the mother. Respondents used a range of criteria to recognize PPH: rate of blood flow, amount of blood (equivalent to two clenched fists), fainting, feeling thirsty, collapsing or losing consciousness immediately after birth. As a group, respondents seemed to correctly identify women at risk of PPH (those with twin pregnancies, high parity or prolonged labour), but many individuals did not know all the reasons. Respondents used cold drink, uterine massage and traditional medicine to treat PPH.
Answer: The community viewed bleeding after childbirth as a normal process and their methods of determining excessive bleeding are imprecise and varied. This opens the door for intervention for reducing delays in the home diagnosis of PPH. This includes increasing awareness among TBAs, women and their families about the risk of death due to excessive bleeding in the immediate postpartum period.
Example Output:
Is excessive bleeding a normal cleansing process : a qualitative study of postpartum haemorrhage among rural Uganda women?