article_snippet.sent: The findings, in the Journal of the American Medical Association, are based on a study of about 95,000 young people.
article_snippet.sent: All those in a study of about 95,000 young people had older siblings.
article_snippet.sent: An accompanying editorial by Bryan King, a doctor at the University of Washington and Seattle Children's Hospital, said the data is clear. '
highlights_snippet.sent: The findings, in the Journal of the American Medical Association, are based on a study of about 95,000 young people .
  