Herbst, C., Rehan, F. A., Brillant, C., Bohlius, J., Skoetz, N., Schulz, H., Monsef, I., Specht, L. and Engert, A. (2010) “Combined modality treatment improves tumor control and overall survival in patients with early stage Hodgkin’s lymphoma: a systematic review”, Haematologica. Pavia, Italy, 95(3), pp. 494-500. doi: 10.3324/haematol.2009.015644.