Kevin Ault, M.D. American Baby

An article about urinary tract infections and the danger they pose for women who are pregnant talks about what causes them, and how to prevent them. Ninety percent of the time, the article says, these infections occur when Escherichia coli (E. coli), a bacterium found around the anal area, becomes trapped in the bladder. Ault, an assistant professor of obstetrics and gynecology at University of Iowa of Iowa Hospitals and Clinics, notes that, during pregnancy, the enlarged uterus and an increase in the hormone progesterone prevent the bladder from emptying completely. As a result, there's a pool of urine left in the bladder, in which bacteria can flourish.

Leslie Dennis, Ph.D. New York Times

Dennis, an assistant professor in the UI College of Public Health, was identified in a story that summarized a sunscreen study she led and published in the Annals of Internal Medicine. The UI research team included Marta Van Beek, M.D., M.P.H., a dermatologist at UI Hospitals and Clinics. The team found no evidence that sunscreen , commonly used to reduce sunburn, actually increases the risk of melanoma. The researchers based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma. Some studies had suggested that using sunscreen reduced the risk of cancer, but researchers may need decades to determine whether newer, more powerful formulas do more than just prevent sunburn, the study said. Dennis said they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma.

Gerald Jogerst, M.D. ABC News

Cases of elder abuse are underreported and are resolved inconsistently nationwide due to significant differences in laws between states, according to a new University of Iowa study. The study, published in the American Journal of Public Health, is thought to be the first to compare rates of elder abuse to laws in all 50 states, said Jogerst, interim head of family medicine and lead investigator on the study. Describing elder abuse as "a national problem," Jogerst said the new study examines abuse that occurs in private residences, not care facilities. The definition of abuse was divided into several categories, including physical, sexual, emotional, financial exploitation, and neglect. States that require mandatory reporting and tracking of elder abuse have much higher investigation rates than states without such requirements, Jogerst said. The Iowa research follows a 1996 report that found only one in five cases of elder abuse is reported and substantiated.