8Schoenberg B S, Greenberg RA, Eesenberg H. Occurrence of certain multiple primary cancers in females[J]. J Natl Cancer Inst, 1969,43 : 15.
9Warren S, Gates O. Multiple primary malignant tumors: Survey of the literature and statistical study [ J ]. Am J Cancer, 1932,16 : 1358 - 1414.
10Schoenberg B S. Multiple primary malignant neoplasms: The Connecticut experience, 1935 - 1964. Recent Resuits Cancer Res [ M ]. New York : Spring Verlag, 1997 : 141 -158.