When and how do 'effective' interventions need to be adapted and/or re-evaluated in new contexts? The need for guidance. Issue 6 (20th February 2019) - Evans, Rhiannon E; Craig, Peter; Hoddinott, Pat; Littlecott, Hannah; Moore, Laurence; Murphy, Simon; O'Cathain, Alicia; Pfadenhauer, Lisa; Rehfuess, Eva; Segrott, Jeremy; Moore, Graham