Although this method is considered the gold standard for estimating sodium intake, that lone urine test may not provide an accurate snapshot of the participants' everyday intake over the full eight-year study, as the researchers themselves note.

CNN: Huh? Low-salt diet ups risk of fatal heart attack?

Patsalis of the Cyprus Institute of Neurology and Genetics said his team is developing a noninvasive method to test for Down syndrome by comparing fetal DNA to the mother's using standard lab equipment, instead of pricey gene-sequencing gear.

WSJ: New Prenatal Tests Offer Safer, Early Screenings