TY - JOUR T1 - The curious incident of groaning in the night-time JF - Breathe JO - Breathe SP - 123 LP - 126 DO - 10.1183/20734735.017816 VL - 13 IS - 2 AU - Ross J. Langley AU - Laura Hill AU - Elizabeth A. Hill AU - Don S. Urquhart Y1 - 2017/06/01 UR - http://breathe.ersjournals.com/content/13/2/123.abstract N2 - Catathrenia (from the Greek kata, meaning “below”, and threnia, meaning “to lament”) is a rare sleep disorder with very few cases reported in children [1]. The principal feature of catathrenia is a monotonic expiratory groaning noise that may or may not be associated with an altered respiratory pattern. It is now classified amongst the sleep-related breathing disorders [2].The first report of catathrenia in a child who has been symptomatic from birth http://ow.ly/XcY830bevOH ER -