Hartmann, J. A., Nelson, B., Amminger, G. P., Spark, J., Yuen, H. P., Kerr, M. J., Polari, A., Wallis, N., Blasioli, J., Dixon, L., Carter, C., Loewy, R., Niendam, T. A., Shumway, M., & McGorry, P. D. (2022). Baseline data of a sequential multiple assignment randomized trial (STEP study). Early Intervention in Psychiatry, 16(10), 1130–1142. Portico. https://doi.org/10.1111/eip.13263