Janet D. Rowley, Who Discovered Cancer Can Be Genetic, Dies at 88

By MARGALIT FOX

In 1972, Dr. Rowley became the first person to show a conclusive link between certain genetic abnormalities and certain cancers.

Hypertension Guide May Affect 7.4 Million

By GINA KOLATA

New blood pressure advice could mean less treatment — or none at all — for millions over the age of 60.

• Hypertension Guidelines Can Be Eased, Panel Says

High Chair Hazards

By NICHOLAS BAKALAR

An average of almost 9,500 toddlers a year are treated in emergency rooms for injuries involving high chairs.

Sex and Intimacy After the Baby Arrives

By CATHERINE SAINT LOUIS

Sexual issues after the birth of a child have not typically been discussed much, but research at the University of Michigan has tried to change that.

Music and the Young Brain

By NICHOLAS BAKALAR

Two new randomized trials do not support the belief that exposing preschoolers to music aids their cognitive development in other areas.

Raw Milk a Hazard for Children and Pregnant Women

By NICHOLAS BAKALAR

The American Academy of Pediatrics has advised children, infants and pregnant women not to consume any raw milk or raw milk products from cows, goats or sheep.

Limits of Vitamin D Supplements

By NICHOLAS BAKALAR

A large review of studies has found that vitamin D supplements have little or no benefit beyond the low levels required for bone health.

Acid-Suppressing Drugs Linked to Vitamin B12 Deficiency

By CATHERINE SAINT LOUIS

A study finds that prolonged use of the drugs can lead to anemia, neurological problems or dementia.

Idea of Healthy Obesity Is Tested

By NICHOLAS BAKALAR

Some obese people have normal cholesterol, glucose levels and blood pressure, but a new study suggests obesity by itself increases the risk for heart disease, stroke, diabetes and death.

F.D.A. Approves Pill to Treat Hepatitis C

By ANDREW POLLACK

The Food and Drug Administration has approved Sovaldi, from Gilead Sciences, which will let some patients be treated for a minimum of 12 weeks, but at a cost of $1,000 per daily pill.

Injections to Treat an Embarrassing Ailment Win U.S. Approval

By ANDREW POLLACK

The Food and Drug Administration has approved eight injections to be used to treat the sometimes painful and embarrassing curvature known as Peyronie’s disease.

Food Allergies Less Deadly Than Accidents

By NICHOLAS BAKALAR

A new study finds that people with food allergies have far less chance of dying from an allergic reaction than from an accident.