RT Journal Article SR Electronic T1 How I approach hyponatraemia JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 291 OP 295 DO 10.7861/clinmedicine.13-3-291 VO 13 IS 3 A1 SG Ball YR 2013 UL http://www.rcpjournals.org/content/13/3/291.abstract