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LOS ANGELES, April 2 (Xinhua) -- People taking antidepressants may be more likely to develop thicker arteries which may raise the risk of heart disease and stroke, a new study suggests.Depression can heighten the risk for heart disease, but the effect of antidepressant use is separate and independent from depression itself, according to the study make public by the American Association for the Advancement of Science (AAAS) on Saturday.The data suggest that antidepressants may combine with depression for a negative effect on blood vessels, said study first author Amit Shah, MD, a cardiology fellow at Emory University School of Medicine.Study findings will be presented on April 5 at the American College of Cardiology meeting in New Orleans, according to the AAAS.The study included 513 middle-aged male twins who both served in the U.S. military during the Vietnam War. Twins are genetically the same but may be different when it comes to other risk factors such as diet, smoking and exercise, so studying them is a good way to distill out the effects of genetics.Researchers measured carotid intima-media thickness - the thickness of the lining of the main arteries in the neck -- by ultrasound. Among the 59 pairs of twins where only one brother took antidepressants, the one taking the drugs tended to have higher carotid intima-media thickness (IMT), even when standard heart disease risk factors were taken into account.The effect was seen both in twins with or without a previous heart attack or stroke. A higher level of depressive symptoms was associated with higher IMT only in those taking antidepressants."One of the strongest and best-studied factors that thickens someone's arteries is age, and that happens at around 10 microns per year," Shah said. "In our study, users of antidepressants see an average 40 micron increase in IMT, so their carotid arteries are in effect four years older."Antidepressants' effects on blood vessels may come from changes in serotonin, a chemical that helps some brain cells communicate but also functions outside the brain, Shah said."I think we have to keep an open mind about the effects of antidepressants on neurochemicals like serotonin in places outside the brain, such as the vasculature. The body often compensates over time for drugs' immediate effects," Shah said. " Antidepressants have a clinical benefit that has been established, so nobody taking these medications should stop based only on these results. This isn 't the kind of study where we can know cause and effect, let alone mechanism, and we need to see whether this holds up in other population groups."

UNITED NATIONS, Jan. 26 (Xinhua) -- China on Wednesday welcomed the smooth development of the south Sudan referendum, voicing its hope that the parties in south and north Sudan could reach a consensus at an early date on the outstanding issues through dialogue and consultations.Li Baodong, the Chinese permanent representative to the United Nations, made the statement in an interview with Xinhua after he spoke at the UN Security Council about the Chinese stance on the situation of Sudan.Earlier on Wednesday, the Security Council met to hear briefings from Atul Khare, UN assistant secretary-general for peacekeeping operations, and Ibrahim Gambari, the joint special representative of the African Union-United Nations Mission in Darfur (UNAMID), on the current situation in Sudan."China welcomes the smooth development of the south Sudan referendum, this is the result of the joint efforts of north and south Sudan and the international community," Li said."At present, priority should be given to the following work: First, continuous efforts should be made to fully maintain peace and stability in Sudan to enable the country to realize its long- term peace, stability and development," he said. "Second, efforts should be made to encourage the parties in south and north Sudan to continue their efforts for the full implementation of the Comprehensive Peace Agreement (CPA), particularly for a consensus at an early date on the outstanding issues."The referendum, with its week-long polling period ending on Jan. 15, will determine whether south Sudan remains a part of Sudan or becomes independent, in accordance with the 2005 CPA that ended a long-running north-south civil war.The referendum's preliminary results are expected to be announced by Feb. 2, and depending on whether appeals are launched in the courts, the final result will be declared on Feb. 7 or 14.

BEIJING, March 29 (Xinhuanet) -- A new study has found that rejection can literally hurt in the same way as physical pain does, according to media reports Tuesday.Researchers found that intense emotional pain, such as feelings of rejection after a breakup of a relationship, can trigger brain activities similar to when people suffer physical pain.The research findings were published in Tuesday's Proceedings of the National Academy of Sciences.The study followed 40 volunteers who experienced unwanted romantic breakups in the past six months, and the researchers analyzed their brain activity during two "painful" situations.The results showed that the two situations, thinking about the loss of their ex-partner and experiencing mild physical pain similar to holding a very hot coffee cup, caused response in the overlapping parts of the brain."This tells us how serious rejection can be sometimes," said study author Edward E. Smith, director of cognitive neuroscience at Columbia University. Smith added. "Our ultimate goal is to see what kind of therapeutic approach might be useful in relieving the pain of rejection."

BEIJING, March 17 (Xinhua) -- The People's Bank of China (PBOC), or the central bank, auctioned 50 billion yuan (7.61 billion U.S. dollars) of three-month bills at a yield of 2.7944 percent on Thursday, temporarily easing speculation of an approaching interest rate hike.The yield on three-month bills stood unchanged from last week at 2.7944 percent.Also, PBOC sold 60 billion yuan (9.13 billion U.S. dollars) worth of 91-day repurchase agreements to banks on Thursday with a yield of 2.8 percent.Offsetting the 181 billion yuan (27.55 billion U.S. dollars) of bills and repurchase agreements that matured, PBOC took 49 billion yuan (7.46 billion U.S. dollars) of liquidity out of the money market this week through open market operations on Tuesday and Thursday.Market analysts have been watching PBOC's open market operations closely this week as the yield of its one-year bill sold on Tuesday exceeded the benchmark interest rate of one-year deposits, which some analysts interpret as a reason for an imminent interest rate hike.Chen Lan, an analyst with Guotai Junan Securities, said higher yields on central bank bills would boost PBOC's ability to absorb liquidity from the market amidst the country's economic tightening efforts."But the hike of interest rates is not an imminent task for the central bank amid the slowdown of China's industrial investment in February, which weakened consumer confidence, and economic uncertainty overseas," Chen said.China's industrial value-added output grew 14.1 percent in the first two months of this year, the National Bureau of Statistics (NBS) announced on Friday.The growth rate during the first two months was up by 0.6 percentage points compared to that in December of last year, according to figures released by the NBS.Chen predicted that PBOC will reduce its frequency to raise banks' reserve requirement ratio in coming months but said the rate hike expectation would continue this year as the government is hoping to curb the red hot property market and soaring inflation.China's consumer price index (CPI), a main gauge of inflation, rose 4.9 percent year on year in February, adding more monetary tightening pressure to the government. 

HEFEI, Feb. 2 (Xinhua) -- Chinese Premier Wen Jiabao has visited farmers and workers in Dabieshan Mountain area, an old revolutionary base in east China's Anhui Province, to extend new year greetings ahead of the Spring Festival, which falls on Thursday.On Tuesday, Wen went to the area's Jinzhai County, once an important Red Army revolutionary base, to learn about the local economic and social development situation.He visited Zhaoyuan Village and called in on farmer Zhao Mengqi. Wen chatted with Zhao, asking about his family's income and their preparations for the lunar new year.Zhao works as a migrant worker in Wujiang City, an economically-developed part of Jiangsu Province. His son and daughter-in-law work in Shanghai. They returned home on the eve of the Spring Festival."With the income we earn working in cities and what we earn growing crops, our family income has increased and we have rebuilt and renovated our house," Zhao told Premier Wen. A paved road now allows buses to reach the village, Zhao added.Wen said, "Only when the people living in old revolutionary bases live better lives can we feel relieved."At farmer Zhao Kongying's home, Wen joined the family in making "yuanzi," a glutinous rice ball traditionally eaten during the Spring Festival.Wen later went to Hetang Village. There he visited villager Yu Shuhua's home and urged the local government to provide more help to needy people to ensure they have a happy lunar new year.At dinner time, he went to villager Zhang Jiasheng's home, joining the family to prepare dinner. He wore an apron and made a soup for the family.During the dinner, Zhang told Wen the village is rich with chestnuts, tea and traditional Chinese medicine, adding that tourism is also a source of income for the village.Wen said help and support for the old revolutionary base should be boosted, so that local people can lead happier lives.Wen also extended new year greetings to workers at the Meishan hydropower station in Jinzhai County.At retired worker Wan Benrong's home, Wen asked about the family's living conditions and their preparations for the lunar new year.After being told the couple received an extra 140 yuan each of monthly pension this year, Wen said the government has increased the basic pension for retired workers seven times since 2005."Our objective is to make you feel secure," Wen said.