前瞻性
3.A prospective study on control of infection for women undergoing cesarean section
5.PROSPECTIVE OBSERVATION ON CORRELATION BETWEEN EB VIRUS AND NASOPHARYNGEAL CARCINOMA (NPC)
8.Prospective observational study on the effec ts of caesarean section on breastfeeding
9.PROSPECTIVE STUDY ON INCIDENCE RATE OF HEPATITIS B IN PEOPLE OF JINAN TROOPS
10.COMBINATON OF CHEMOTHERAPY AND RADIOTHERAPY IN THE TREATNENT OF NASOPHARYNGEAL CARCINOMA (NPC——A Prospective randomized Trial on 72 Patients

