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NEW ORLEANS -- A rapid genotyping assay may help predict warfarin (Coumadin) dose response, researchers found.

NEW ORLEANS -- An investigational drug-eluting stent called Xience, coated with everolimus, led to significantly less late lumen loss restenosis after nine months than did the Taxus (paclitaxel-eluting) stent, said researchers here today.

NEW ORLEANS -- Low-dose aspirin reduced myocardial infarction and death following coronary stenting and other percutaneous coronary interventions, and it was significantly less toxic than high dose aspirin, researchers reported here.

NEW ORLEANS -- Among the blizzard of clinical trials to be presented at the American College of Cardiology meeting here over the next four days are 11 singled out for special treatment --simultaneous online publication in peer-reviewed journals.

LONDON -- Minimally invasive coronary artery bypass grafts are at least as effective as stenting, and maybe cheaper over the long haul, according to three studies published in BMJ.

HONG KONG -- Replacement of degenerative discs in the cervical spine with cadaver allografts shows early promise as an alternative to fusion or artificial discs, found researchers here.

MEMPHIS, Tenn. -- Clinicians may one day give children a nasal spray of viral enzymes to prevent acute otitis media, researchers said here.

WASHINGTON -- White House spokesman Tony Snow, who was treated for colon cancer in 2005, said today he would have surgery on Monday to resect a small growth discovered in his lower abdomen. He cautioned reporters against jumping to conclusions.

TORONTO -- The common practice of giving patients with acute lung injury nitric oxide (NO) may do more harm than good, investigators here reported.

CHAPEL HILL, N.C. -- John Edwards, the former senator, announced today that his wife, Elizabeth Edwards, 57, has had a recurrence of breast cancer, a bony metastasis, but he is continuing his campaign to be the Democratic candidate for the presidency. Elizabeth Edwards had a lumpectomy in 2004 and adjuvant chemoradiation. He and his wife called the malignancy treatable. "The campaign goes on," he said.

NEW YORK -- Progression-free survival may be a blurry yardstick for the efficacy of cancer drugs because the definition of when progression begins is subjective, cautioned investigators here.

BALTIMORE -- Genetically modified mosquitoes could turn the tables one day on malaria, according to researchers here. They created a mosquito unable to carry and transmit the malaria parasite.

AMSTERDAM -- Port-wine stains may redarken over time after pulsed-dye laser treatments but nonetheless remain lighter than pretreatment, researchers here have found.

NEW HAVEN, Conn. -- Transplant recipients typically require a complicated schedule of drugs that may be too convoluted for patients to keep straight, found researchers here.

BRISTOL, England -- Even 15 minutes a day of extra moderate to vigorous running, jumping, or kicking a ball can dramatically cut the risk of childhood obesity, according to researchers here.

PHILADELPHIA -- Spinal cord injuries among patients 70 and older have increased fivefold over the past three decades, researchers here reported.

NEW YORK -- Minnesota and Vermont require pharmaceutical companies to disclose payments of or more to physicians and other health care providers, but both states have been accused of failing to deliver on that promise of transparency.

MEMPHIS, Tenn. -- Children and adolescents who survive acute lymphoblastic leukemia (ALL) may need a lifetime of follow-up due to elevated risk of secondary neoplasms that continues to climb through adulthood.