RT Journal Article SR Electronic T1 Images of the month 2: Extensive pneumocephalus after subdural haematoma JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e669 OP e669 DO 10.7861/clinmed.2021-0548 VO 21 IS 6 A1 Vanderson Neri A1 Carla Slater YR 2021 UL http://www.rcpjournals.org/content/21/6/e669.abstract