A randomized controlled trial of a trauma-informed smartphone application in reducing firefighters' mental health symptoms. - Tracey Varker; Olivia Metcalf; Yee Foong Mok; Karen E. Lamb; Julia Fredrickson; Hussain-Abdulah Arjmand; Phoebe Howlett; Kari Gibson; Le Pham; Kate Everett; Meaghan Louise O'donnell (npj Digit. Medicine, 2025)