Hollenstein, Y., Elzi, L., Hatz, C., Passweg, J., Weisser, M., Stoeckle, M., Halter, J., & Egli, A. (2015). Travelling activity and travel-related risks after allogeneic haematopoietic stem cell transplantation – a single centre survey. Swiss Medical Weekly, 145(2122), w14136. https://doi.org/10.4414/smw.2015.14136