Knieling, F., Neufert, C., Hartmann, A., Claussen, J., Urich, A., Egger, C., Vetter, M., Fischer, S., Pfeifer, L., Hagel, A., Kielisch, C., Görtz, R.S., Wildner, D., Engel, M., Röther, J., Siebler, J., Atreya, R., Rascher, W., Strobel, D., Neurath, M.F., Waldner, M.J., Ultrasound-guided multispectral optoacoustic tomography for non-invasive prediction of endoscopic disease activity in Crohn’s disease: a prospective clinical trial, submitted for publication