Karlen, S., Oertle, M., Weiler, S., Schneemann, M., Eschmann, E., Kullak-Ublick, G.-A. and Blaser, J. (2015) “Too frequent low-dose methotrexate prescriptions: multicentre quality control and quality assurance with pre- and post-analysis”, Swiss Medical Weekly, 145(4748), p. w14218. doi: 10.4414/smw.2015.14218.