September 14, 2018 6 min read Save ADD TOPIC TO EMAIL ALERTS Receive an email when new articles are posted on Please provide your email address to receive an email when new articles are posted on . We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com. Nearly half of American teenagers report sleep difficulties that affect their daily functioning, according to findings published in the Journal of Adolescence.