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WASHINGTON, Nov. 14 (Xinhua) -- Vitamin D levels are significantly lower in patients with recurrent inflammatory spinal cord disease, according to a study published online Monday in Archives of Neurology.Vitamin D is a steroid vitamin that promotes the intestinal absorption and metabolism of calcium and phosphorus. In recent years, low levels of vitamin D have been linked to a variety of autoimmune conditions, including multiple sclerosis (MS). However, the importance of vitamin D in monophasic or recurrent non-MS spinal cord diseases including transverse myelitis and neuromyelitis optica is unknown, according to background information in the article.Transverse myelitis (TM) is a disease of the spinal cord in which there is involvement of the myelin sheath that protects nerve fibers; symptoms include back pain and weakness in the legs. Neuromyelitis optica (NMO) is a disease of the central nervous system that affects the optic nerves and spinal cord.Maureen Mealy, of Johns Hopkins University and colleagues investigated the association between low serum vitamin D levels and recurrent spinal cord disease. They analyzed data on vitamin D levels among 77 patients with monophasic (having only one phase or stage) and recurrent inflammatory diseases of the spinal cord, adjusting for season, age, sex, and race. The study found that vitamin D levels were significantly lower in patients who developed recurrent spinal cord disease."Our findings suggest that there may be an association between lower total 25-hydroxyvitamin D levels in patients with recurrent TM/NMO/ spectrum disorders as compared with their counterparts with monophasic disease," the authors report. They suggest that future studies are needed to further assess the relationship between vitamin D and recurrent spinal cord disease.

BEIJING, Nov. 5 (Xinhua) -- China's top political advisor Jia Qinglin's official goodwill visit to Greece, the Netherlands and Germany has deepened the friendship, promoted cooperation and enhanced understanding between China and the three nations, a Chinese official says.The visit was important in further deepening the friendship and mutual trust, promoting pragmatic cooperation and pushing forward the healthy development of relations between China and Europe, said Wang Shenghong, vice secretary general of the National Committee of the Chinese People's Political Consultative Conference (CPPCC).Jia, chairman of the CPPCC National Committee, had in-depth exchanges of views and reached broad consensus with government and parliament leaders of the three countries on issues related to bilateral ties and international and regional issues of common interest, said Wang, who accompanied Jia on the tour from Oct. 23 to Nov. 4.Jia Qinglin (R), chairman of the National Committee of the Chinese People's Political Consultative Conference, meets with Greek President Karolos Papoulias in Athens, Greece, on Oct. 24, 2011.During his visits, Jia also witnessed the signing of 15 inter-governmental agreements and commercial contracts, had extensive contact with people from different walks of life and visited some big-name companies.STRENGTHEN POLITICAL MUTUAL TRUST AND BUILD UP BILATERAL TIESDuring meetings and talks with leaders of the three countries, Jia expressed China's readiness to maintain the high-level exchanges of visits, build up political mutual trust, advance pragmatic cooperation, promote people-to-people and cultural exchanges and strengthen coordination in international affairs, Wang said.Jia said China is ready to work with the three nations to further advance bilateral ties and China-European Union (EU) relations.Greece's government and parliament leaders thanked China for its precious support at a time when Greece is being badly hurt by the financial crisis. Dutch leaders expressed their willingness to strengthen dialogue and cooperation with China in their joint response to the Europe debt crisis and other challenges. And German leaders praised China's positive role in overcoming the effects of the international financial crisis and stabilizing the world economy, Wang said.

WASHINGTON, Nov. 14 (Xinhua) -- Nearly a fifth of all Americans 12 years or older have hearing loss so severe that it may make communication difficult, according to a new study led by Johns Hopkins University researchers and published Monday in the Archives of Internal Medicine.The findings, thought to be the first nationally representative estimate of hearing loss, suggest that many more people than previously thought are affected by this condition.Study leader Frank Lin, an assistant professor, and his colleagues used data from the National Health and Nutritional Examination Surveys (NHANES), a research program that has periodically gathered health data from thousands of Americans since 1971. The researchers analyzed data from all participants age 12 and over whose hearing was tested during NHANES examinations from 2001 to 2008. Unlike previous estimates, NHANES includes men and women of all races and ages, from cities scattered across the country, so it's thought to statistically mimic the population of the Untied States.Using the World Health Organization's definition for hearing loss (not being able to hear sounds of 25 decibels or less in the speech frequencies), the researchers found that overall, about 30 million Americans, or 12.7 percent of the population, had hearing loss in both ears. That number jumps to about 48 million, or 20.3 percent, for people who have hearing loss in at least one ear. These numbers far surpass previous estimates of 21 to 29 million.Hearing loss prevalence nearly doubled with every age decade, with women and blacks being significantly less likely to have hearing loss at any age. Lin and his colleagues aren't sure why these groups appear to be protected. However, he notes that the female hormone estrogen, as well as the melanin pigment in darker skin, could have a protective effect on the inner ear.

SAN FRANCISCO, Nov. 21 (Xinhua) -- Hewlett-Packard Co. (HP) on Monday reported that its profit in the most recent quarter fell more than 90 percent with sales also declining.In the company's fourth quarter of fiscal 2011 ended Oct. 31, the company posted net earnings of 239 million U.S. dollars, compared with 2.54 billion dollars in the same period a year earlier.HP's net revenue for the quarter reached 32.1 billion dollars, down 3 percent year-on-year.Excluding one-time items, HP earned 1.17 dollars per share, which topped estimates of analysts.According to Thomson Reuters, analysts had expected earnings of 1.13 dollars per share on revenue of 32.05 billion dollars.It was the first earnings report since Meg Whitman took over as chief executive officer (CEO) of the information technology giant on Sept. 22, replacing Leo Apotheker."HP has a great opportunity to build on our strong hardware, software, and services franchises with leading market positions, customer relationships, and intellectual property," Whitman said in a statement after the earnings announcement."We need to get back to the business fundamentals in fiscal 2012, including making prudent investments in the business and driving more consistent execution," she added.

BEIJING, Oct. 21 (Xinhuanet) -- A team of European researchers announced that they have found vast water vapor out of our solar system, according to a study in the U.S. journal Science Friday.Using Herschel Space Observatory, a European Space Agency satellite, the researchers observed that the vast water vapor enveloped a 175-light-year-away star and its surrounding dusk disk, which will eventually form a planet.The water vapor, which is "enough to fill thousand of Earth ocean", may rain down and seed the future oceans on the young planet, as it did on the Earth 4.5 billion years ago, the researchers suggested."Scientists have long suspected there were these reservoir of cold water hiding in the outer regions of planet disk, ... now the theory gets considerably stronger." said astronomer Michiel Hogerheijde of Leiden Observatory in the Netherlands.The finding not only explained where our Earth's ocean came from, but also indicated that there are likely to be many "ocean worlds" throughout the galaxies, he concluded.