Study protocol for a randomized controlled trial of supportive parents – coping kids (SPARCK)—a transdiagnostic and personalized parent training intervention to prevent childhood m... von Tømmerås, T, Backer-Grøndahl, A, Høstmælingen, A, Laland, H, Gomez, MB, Apeland, A, Karlsson, LRA, Grønlie, AA, Torsvik, S, Bringedal, GE, Monica, A, Fisher, PA, Gardner, F, Kjøbli, J, Malmberg-Heimonen, I, Nissen-Lie, HA