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DURHAM, N.C. -- The mystery of obsessive-compulsive disorder may be at least partly solved, with a discovery that implicates a structural protein missing in the brains of certain excessively groomed mice.

LOS ANGELES -- When surgical residents were limited to an 80-hour workweek there was a significant increase in the rate of complications-but no increase in deaths-at an academic level I trauma center here.

ST. LOUIS -- Safer, more predictable warfarin therapy could come from pretreatment genotyping to individualize dosing, investigators here reported.

IOANNINA, Greece -- Clinicians may have to reassess the ABCs of the gender differences in disease manifestations specifically linked to X or Y chromosomes.

PARIS -- Women who use antioxidant supplements may be increasing their risk of developing skin cancer, according to results of a randomized trial of more than 13,000 men and women.

BOSTON -- Circulating hormones may not be responsible for the elevated breast cancer risk associated with mammographic breast density among postmenopausal women as had been thought, researchers here found.

SAN FRANCISCO -- Cancer patients may need an attorney working hand-in-hand with their oncology team.

LOS ANGELES -- Traffic-related air pollution increases asthma risk among children with genetic variants that affect the lungs' ability to clear toxins, researchers found.

CLEVELAND -- If patients experience different types of auras during a seizure, their epilepsy may arise from a single region of the brain, making them good candidates for surgery, researchers here said.

CHAPEL HILL, N.C. -- A robotic-assisted laparoscopic prostatectomy seems to lead to a faster surgical recovery than an open procedure, found investigators here.

LOS ANGELES -- Being 70 or older is no barrier to a liver transplant, researchers here said.

WASHINGTON -- Medicare has told hospitals that they will soon be responsible on their own for the expenses that incur from many common preventable mistakes they make.

ATLANTA -- Advanced laryngeal cancer occurs disproportionately among the uninsured and patients on Medicaid, investigators here reported.

CHAPEL HILL, N.C. --The farther patients must travel to reach a specialist who can diagnose melanoma, the more likely they are to have a thicker lesion, researchers here reported.

SAN FRANCISCO -- Sexual predators are more likely to inflict excessive injury on women with physical disabilities than on those with mental or developmental problems, investigators reported here.

EAST HANOVER, N.J. -- The FDA has approved a once-yearly intravenous formulation of zoledronic acid (Reclast) for osteoporosis in postmenopausal women, Novartis announced.

SAN FRANCISCO -- The ability to cope with stress may be linked to HDL levels, researchers found.

NEW YORK -- A double-barreled initial approach to chronic myelogenous leukemia with both imatinib (Gleevec) and dasatinib (SPRYCEL) may prevent treatment-resistant genetic mutations.