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LOS ANGELES, May 8 (Xinhua) -- Kids born in the spring and summer months might be more likely to develop celiac disease, U.S. researchers have found.Researchers from the Massachusetts General Hospital for Children drew the conclusion after examining data on 382 children diagnosed with celiac disease at between 11 months and 19 years of age, HealthDay News reported on Sunday.The study found that in the 15- to 19-year-old set, birth season appeared to make no difference, but among 317 children younger than 15 years of age, 57 percent were born in the "light" season of March through August, compared with 43 percent who were born in the "dark" season of September through February.The findings suggest that the higher incidence of this autoimmune disease may be related to a combination of seasonal and environmental factors, the report said.Celiac disease is a digestive disorder triggered by consuming the protein gluten, which is primarily found in bread and other foods containing wheat, barley or rye. It can damage the small intestine and make it difficult to absorb certain nutrients, causing problems ranging from abdominal pain to nerve damage.Even though the exact cause of celiac disease is unknown, potential triggers include the timing of infants' introduction to gluten, and viral infections contracted during the first year of life.The study's findings suggest the season of a child's birth is another potential risk factor for the disease.The researchers pointed out that infants are generally introduced to solid foods containing gluten at around six months of age, which for spring and summer babies would coincide with cold and flu season.Based on the findings, the age at which gluten is first offered to some babies may need to be altered, said the study's lead researcher, Dr. Pornthep Tanpowpong. "If you're born in the spring or the summer, it might not be appropriate to introduce gluten at the same point as someone born in the fall or winter," said Tanpowpong. "Although we need to further develop and test our hypothesis, we think it provides a helpful clue for ongoing efforts to prevent celiac disease."The study also noted that exposure to sunlight may also play a role in celiac disease, since vitamin D deficiency has been associated with the disease.The study was presented Sunday in Chicago during Digestive Disease Week, an international gathering sponsored by the American Gastroenterological Association and other organizations, HealthDay News said.Because the study was presented at a medical meeting and is small, its findings should be considered preliminary until published in a peer-reviewed journal and confirmed in other research, the report said.

WASHINGTON, May 17 (Xinhua) -- A variation in a gene involved in regulating cholesterol in the bloodstream also appears to affect progesterone production in women, making it a likely culprit in a substantial number of cases of their infertility, a new study from Johns Hopkins University researchers suggests.The Hopkins group has also developed a simple blood test for this variation of the scavenger receptor class B type 1 gene ( SCARB1) but emphasized there is no approved therapy yet to address the problem in infertile women.Following up studies in female mice that first linked a deficiency in these receptors for HDL -- the so-called "good" or " healthy" cholesterol -- and infertility, researchers report finding the same link in studies of women with a history of infertility.The findings has been published on-line this week in the journal Human Reproduction.If the new study's findings hold up on further investigation, the John Hopkins team says they not only will offer clues into a genetic cause of some infertility, but could also lead to a treatment already shown to work in mice."Infertility is fairly common and a lot of the reasons for it are still unknown," warns endocrinologist Annabelle Rodriguez, an associate professor of medicine at the Johns Hopkins University School of Medicine and the lead author. "Right now, the benefit of this research is in knowing that there might be a genetic reason for why some women have difficulty getting pregnant. In the future, we hope this knowledge can be translated into a cure for this type of infertility."

WASHINGTON, May 20 (Xinhua) -- Two U.S. astronauts conducted the first of four spacewalks for space shuttle Endeavour's STS-134 mission on Friday morning, the U.S. National Aeronautics and Space Administration (NASA) said.According to the U.S. space agency, Endeavour's mission specialists Andrew Feustel and Greg Chamitoff completed the six-hour, 19-minute spacewalk at 9:29 a.m. EDT (1329 GMT). They successfully installed antennas for the External Wireless Communication system, routing cables, setting up the antenna, installing handrails, and connecting power cables.Because of a carbon dioxide sensor failure in Chamitoff's spacesuit, flight controllers limited his spacewalk time to about six hours 20 minutes, 10 minutes less than the planned six hours and 30 minutes. There was no indication his suit's carbon dioxide levels would rise. However, they deferred tasks to remove a micrometeoroid debris shield to access and attach some of the connection points.This was the 245th spacewalk conducted by U.S. astronauts. It was Feustel's fourth spacewalk for a total time of 27 hours and 17 minutes, and Chamitoff's first.Endeavour lifted off on Monday morning from Kennedy Space Center in Florida, to deliver to the International Space Station a 2-billion-dollar, multinational particle detector known as the Alpha Magnetic Spectrometer (AMS).AMS, a particle physics detector, is designed to search for various types of unusual matter by measuring cosmic rays. Its experiments are designed to help researchers study the formation of the universe and search for evidence of dark matter, strange matter and antimatter.

BEIJING, Jan. 29 (Xinhua) -- Chinese State Councilor Dai Bingguo and U.S. National Security Advisor Tom Donilon on Saturday both spoke highly of Chinese President Hu Jintao's state visit to the United States earlier this month.During a phone conversation, Dai and Donilon agreed that China and the United States should make joint efforts to properly implement the consensus reached by leaders on both sides and cement the achievements made during Hu's visit, which was on Jan. 18-21.They also said that the two sides should maintain the current momentum in the development of bilateral ties and devote themselves to building a cooperative partnership based on mutual respect and mutual benefit.

VIENNA, March 18 (Xinhua) -- The 26th Annual Congress of the European Association of Urology (2011 EAU congress) kicked off on Friday at the Vienna Austria Center in the Austrian capital Vienna.About 14,000 doctors, experts, scholars and representatives of pharmaceutical enterprises in the field of urology from more than 80 countries took part in the event, which will last till Tuesday.The EAU congress is Europe's largest fair in the field of urology. This is the third time for Vienna to host the event.The EAU congress aims to review technical innovation and technological progress in the field of urology and related subspecialties, discuss new theories, new technologies and new diagnostic methods of urological clinical trials, optimize the risk management of urological disease, and enhance doctors' practical knowledge and skills by educational activities.It also provides an important platform for related pharmaceutical, medical equipments and medical consumables manufacturers to present their latest products and technologies, and creates the opportunity of face-to-face communication between suppliers and consumers.The highlights of this year's EAU congress include the discussion of state-of-the-art kidney imaging and the application of ultrasound, computerized tomography (CT-scan) and magnetic resonance imaging (MRI).Participants are also expected to give a timely overview on the role of imaging, focal therapy and kidney biopsy in the management and follow-up of small renal masses, as well as the use of imaging in the management of urinary incontinence and other pelvic urinary pathologies.Congress organizers said that more than 200 presentations and seminars are scheduled during the five-day meeting, with an estimated 400 speakers unveiling their latest findings.