P43 A systematic review of the effectiveness of personal letters to healthcare professionals in changing professional behaviours
Aikaterini Grimani, Mei Yee Tang, Louis Goffe, Fiona Beyer, Falko Sniehotta, Ivo Vlaev
J Epidemiol Community Health Sep 2021, 75 (Suppl 1) A61-A62; DOI: 10.1136/jech-2021-SSMabstracts.131