4Rovatti M,Gerosa E, Turi V, et al. Multiple primary malignant neoplasmas. Minerva Chir, 1995,50:949-958.
5Prosperi Porta R, Lalle M, Palazzetti PL, et al. Multiple primary neoplasms considerations on 42 cases. Eur J Gynaecol Oncol, 1995,16:482-487.
6Poon RT,Law SY, Chu KM, et al. Multiple primary cancers in esophapeal squamous cell carcinoma:incidence and implications. Ann Thorac Surg, 1998,65:1529-1534.
7Okada M, Tsubota N, Yoshimura M, et al. Operative approach for multiple primary lung carcinomas. J Thorac Cardiovasc Surg, 1998,115:836-840.
8Dhooge IJ, De Vos M, Van Cauwenberge PB. Multiple primary malignant tumors in patients with head and neck cancer: results of a prospective study and future perspectives. Laryngoscope, 1998, 108:250-256.
9Pietrysiak A, Konieczny P. Multiple primary malignant neoplasms. Otolaryngol Pol, 1995, 20:187-190.
10Kodama M,Tur GE, Shiozawa N, et al. Clinicopathological features of multiple primary gastric carcinoma. J Surg Oncol,1996, 62:57-61.