In memoriam: Professor David Cooper (1949 to 2018). Issue 6 (29th June 2018) - Kippax, Susan; Mayer, Kenneth H; Sohn, Annette; Bekker, Linda‐Gail; Pozniak, Anton; Beyrer, Chris; Lewin, Sharon R; Ryan, Owen; Phanuphak, Praphan; Kirby, Michael