RT Journal Article SR Electronic T1 Intractable vomiting: diagnostic clues in plain neck films JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 127 OP 128 DO 10.1136/emermed-2016-205734 VO 34 IS 2 A1 Hope Olivia Ward A1 David Alao YR 2017 UL http://emj.bmj.com/content/34/2/127.abstract AB