4、Methods: A retrospective cohort study was performed , Date from birth defects of Hoping distinct Shenyang in 2007.
8、A retrospective cohort study was conducted among iron and steel workers working in 18 iron and steel making and rolling factories from 3 Chinas iron and steel group corporations.
3、Methods A cross sectional and a retrospective cohort study and animal experiment were carried out.
9、Which test is a better strategy to determine the outcome of atypical glandular cell-cate-gorized Pap smears? Immunocytochemical p16INK4A expression or human papillomavirus test-A retrospective cohort study
6、Methods This retrospective cohort study used data from a perinatal database that included all deliveries at Magee-Womens Hospital from 1995 to 2002.
5、The retrospective cohort study drew information relating to the treatment of diabetic patients from 300 British general practice records.
7、The retrospective cohort study from JMEC also showed the importance of having effective antibacterial concentrations present in ocular tissues and fluids at the time of surgery.
2、Research Design and Methods:A retrospective cohort study using data obtained from the VHA Diabetes Epidemiology Cohort was employed.
1、Methods A retrospective cohort study was used in this study.
