1. Warren S, Gates O. Multiple primary malignant tumors. A survey of the literature and a statistical study.Am J. Cancer 1932;16:1358–1414
2. Warren S, Ehrenreich T. Multiple primary malignant tumors and susceptibility to cancer.Cancer Res 1944;4:554–570
3. Hurt HH, Broders AC. Multiple primary malignant neoplasms.J Lab Clin Med 1933;18:765–777
4. Stalker LK, Phillips RB, Pemberton JJ. Multiple primary malignant lesions.Surg Gynecol Obstet 1939;68:595–602
5. Urano Y, Itoyama S, Fukushima T, Kitamura S, Mori H, Baba K, Aizawa S. Multiple primary cancers in autopsy cases of Tokyo University Hospital (1883–1982) and in Japan Autopsy Annuals (1974–1982).Jpn J Clin Oncol 1985;15:271–279