RT Journal Article SR Electronic T1 Calcichew tablet causing oesophageal obstruction and aspiration pneumonia JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 260 OP 260 DO 10.1136/emermed-2013-202640 VO 31 IS 3 A1 Ben Lovell YR 2014 UL http://emj.bmj.com/content/31/3/260.abstract AB