Liemburg, E. J., Castelein, S., van Es, F., Scholte-Stalenhoef, A. N., van de Willige, G., Smid, H., . . . Bruggeman, R. (2014). The Psychosis Recent Onset GRoningen Survey (PROGR-S): Defining Dimensions and Improving Outcomes in Early Psychosis. PLoS One.

Liemburg, Edith J., Stynke Castelein, Frank van Es, Anne Neeltje Scholte-Stalenhoef, Gerard van de Willige, Henderikus Smid, Ellen Visser, Henderikus Knegtering, και Richard Bruggeman. "The Psychosis Recent Onset GRoningen Survey (PROGR-S): Defining Dimensions and Improving Outcomes in Early Psychosis." PLoS One 2014.

Liemburg, Edith J., et al. "The Psychosis Recent Onset GRoningen Survey (PROGR-S): Defining Dimensions and Improving Outcomes in Early Psychosis." PLoS One 2014.