X-ray radiative transfer in protoplanetary disks - The role of dust and X-ray background fields Ch. Rab, M. Güdel, P. Woitke, I. Kamp, W.-F. Thi, M. Min, G. Aresu and R. Meijerink A&A, 609 (2018) A91 Published online: 18 January 2018 DOI: 10.1051/0004-6361/201731443