Baseline data of a sequential multiple assignment randomized trial (STEP study). - Hartmann, Jessica A.; Nelson, Barnaby; Amminger, Günther Paul; Spark, Jessica; Yuen, Hok Pan; Kerr, Melissa J.; Polari, Andrea; Wallis, Nicky; Blasioli, Julie; Dixon, Lisa; Carter, Cameron; Loewy, Rachel; et al. (Early Intervention in Psychiatry, 2022)