The rate of exposure to HGV was low among the dialysis patients in our study. The appearance of anti-E2 was accompanied by clearance of serum HGV-RNA. No relationship was noted between HGV exposure and age, sex, history of blood transfusion, time on dialysis and HCV or HBV markers.

It is undeniable that SMEs face many management-related problems. These problems are often deeply rooted in the strategic decision making by managers. One of these decisions is associated with the production section. Many of these companies provide production infrastructure at high costs; however, they are unsuccessful in acquiring their market share. In these circumstances, providing a solution to the decision-making problem of managers in these companies can prevent the loss of capital. In this research, the system dynamics approach is used to test the hypothesis of a company's participation in the production field after securing a success in business activities of the market. In the present study, the SME performance model, proposed by Schmid's, is considered as the base model. After analyzing its construction steps according to managers' viewpoints, the model has been developed based on the conditions in Iran. Then, the research scenario is presented as follows. If an entrepreneur, before entering the production sector, tries to establish a customer network by conducting business activities, the organization's chance for success will increase. By defining a variable called "production switch" and adding it as a function of a loyal customer network, the model has been tested. After simulating the model for a 5-year period, it is concluded that the rate of return on investment of an organization that has conducted the commercial activities at the outset of production is four times higher than that at the outset of production without the commercial activity.

Hepatitis G virus (HGV) is a blood-borne virus. Some present data demonstrate an occupational risk of HGV infection in medical staff of dialysis units. The aim of this investigation was to assess the prevalence of HGV exposure in dialysis staff. This study was performed in a main dialysis unit in Iran. In 27 dialysis staff, HGV exposure was detected serologically by the presence of anti HGV envelope protein E2 (anti-E2) by an enzyme-linked immunosorbent assay, and compared with 77 hemodialysis (HD) and 13 continuous ambulatory peritoneal dialysis (CAPD) patients. All of them were also screened for hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (anti-HBs), and hepatitis C antibody (anti-HCV). A low prevalence of HGV exposure was found in the dialysis staff (0%), which nearly corresponded to the prevalence of the dialysis patients (HD 3.89%, CAPD 0%). The prevalence of anti-HCV and anti-HBs in staff was 37.03% and 33.33%, respectively, which was higher than HGV anti-E2. The prevalence of HGV exposure was low in dialysis staff in our study, and was near to the prevalence of HGV exposure in dialysis patients. Therefore, it can be concluded that the occupational risk for HGV exposure in our investigation was minimal.