Wallén, H., Lindfors, P., Andersson, E., Hedman-Lagerlöf, E., Hesser, H., Lindefors, N., . . . Ljótsson, B. (2021). Return on investment of internet delivered exposure therapy for irritable bowel syndrome: A randomized controlled trial. BMC Gastroenterol.

Wallén, Hugo, Perjohan Lindfors, Erik Andersson, Erik Hedman-Lagerlöf, Hugo Hesser, Nils Lindefors, Cecilia Svanborg, e Brjánn Ljótsson. "Return On Investment of Internet Delivered Exposure Therapy for Irritable Bowel Syndrome: A Randomized Controlled Trial." BMC Gastroenterol 2021.

Wallén, Hugo, et al. "Return On Investment of Internet Delivered Exposure Therapy for Irritable Bowel Syndrome: A Randomized Controlled Trial." BMC Gastroenterol 2021.