8Volm M, Mattern J. Resistance mechanisms and their regulation in lung cancer. Crit Rev Oncogenesis, 1996; 793-40: 227 - 244.
9Savaraj N ,Wu CJ ,Xu R ,et al. Multi--drug resistance gene expression in small-cell lung cancer. Am J Clin Oncol,1997;20(4):398-403.
10Gospodarowicz D, Abraham JA, Schilling J. Isolation and characterization of a vascular endothelial cell mitogen produced by pituitary-derived folliculo stellate cells. Proc Natl Acad Sci USA,1989;86(19) :7311-7315.