van den Bergh Alfons C M, Dullaart Robin P F, Hoving Marjanke A, Links Thera P, ter Weeme Cees A, Szabó Ben G, Pott Jan Willem R
Department of Radiation Oncology, University Hospital Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands.
Radiother Oncol. 2003 Aug;68(2):95-100. doi: 10.1016/s0167-8140(03)00202-0.