1Blechacz B, Gores GJ. Cholang iocarcinoma: advances in pathogenesis, diagnosis, and treatment. H epatology,2008,48 ( 1 ) :308 - 321.
2Kikuchi Y. study on clinical application of muhipic fractions perday radiation therapy with concomitant boost techmique for esopha- gealcancer[ J]. Hokkmdo Igaku Zasshi ( Japa- nese) ,1993,68(4) :537 -556.