RT Journal Article SR Electronic T1 Sleep in adolescents and young adults JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 109 OP 110 DO 10.7861/clinmedicine.18-1-109a VO 18 IS 1 A1 Martin Lee YR 2018 UL http://www.rcpjournals.org/content/18/1/109.2.abstract