RT Journal Article SR Electronic T1 Sleep medicine in Europe: 50 years of evolution JF Breathe JO Breathe FD European Respiratory Society SP 220206 DO 10.1183/20734735.0206-2022 VO 18 IS 3 A1 Walter T. McNicholas YR 2022 UL http://breathe.ersjournals.com/content/18/3/220206.abstract AB