The effect of a single fraction compared to multiple fractions on painful bone metastases: a global analysis of the Dutch bone metastasis study. - Steenland,E.; Leer,J.; van Houwelingen,H.; Post,W.J.; van den Hout,W.B.; Kievit,J.; de Haes,H.; Martijn,H.; Oei,B.; Vonk,E.; van der Stehen-Banasik,E.; Wiggenraad,R.GJ.; et al. (Radiother Oncol, 1999)