RT Journal Article SR Electronic T1 Using Option Grids: a referee's commentary JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 4 OP 5 DO 10.1136/practneurol-2013-000788 VO 14 IS 1 A1 Mark Manford YR 2014 UL http://pn.bmj.com/content/14/1/4.abstract AB