RT Article T1 The great sleep recession: Changes in sleep duration among US adolescents, 1991-2012 JF Pediatrics VO 135 IS 3 SP 460 OP 468 A1 Keyes, Katherine M. A1 Schulenberg, John E. -2023 A1 Hamilton, Ava A1 Maslowsky, Julie A2 Schulenberg, John E. -2023 A2 Hamilton, Ava A2 Maslowsky, Julie LA English YR 2015 UL https://krimdok.uni-tuebingen.de/Record/1912569078 DO 10.1542/peds.2014-2707