RT Journal Article SR Electronic T1 Gratitude by Oliver Sacks JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 90 OP 90 DO 10.1136/practneurol-2021-003219 VO 22 IS 1 A1 Phil E M Smith YR 2022 UL http://pn.bmj.com/content/22/1/90.abstract AB