Children's Hospital Boston
Researchers called the rates a "national public health crisis."
About one in five teens has had one, and they're most common among those who play a contact sport.
Customs and Border Protection officials said they booted the researcher and his family for reasons unrelated to President Donald Trump's travel ban.
Five-year-old Ari Schultz received a heart transplant in March.
Inside the struggle to make doctors' offices more inclusive.
They're three times more likely to die from abuse than rich kids.
More than a year after lead-contaminated drinking water prompted a state of emergency in Flint, Michigan, Americans across
Austin Prario, 19, might be the only person in history with this rare congenital heart condition to finish the Boston Marathon.