Lisa Emerson

1 INTRODUCTION Twenty percent of cancer treatment trials fail due to low patient recruitment.

Methods Design This will be a multi-arm parallel group, single blind (rater), randomised clinical trial. Caregiver–child dyads will be randomly allocated to one of three support arms: ACT alone, NDBI alone or NDBI+ACT. Randomisation will be performed as block randomisation with a 1:1:1 allocation using minimisation and stratification by ethnicity (participants who self-identify as Māori or non-Māori). Participant flow throughout the trial is depicted in figure 1.

On 15 March 2019, my country changed forever when a gunman opened fire in two mosques in Christchurch. 51 people died in New Zealand’s worst ever mass shooting. The gunman live streamed the massacre on Facebook, and posted an online “manifesto”, with the stated intention of inspiring similar acts of terror around the world.