No abstract available.
Diet*

BACKGROUND: Previous randomized controlled trials (RCTs) have reported inconsistent findings regarding the association between vitamin C supplementation and the risk of cancer. METHODS: We performed a meta-analysis of RCTs to investigate the efficacy of vitamin C supplements for prevention of cancer. We searched the PubMed, EMBASE, and Cochrane Library databases in November 2014 using common keywords related to vitamin C supplements and cancer. RESULTS: Among 785 articles, a total of seven trials were identified, which included 62,619 participants; 31,326 and 31,293 were randomized to vitamin C supplementation and control or placebo groups, respectively, which were included in the final analysis. A fixed-effects meta-analysis of all seven RCTs revealed no significant association between vitamin C supplementation and cancer (relative risk, 1.00; 95% confidence intervals, 0.95-1.05). Similarly, subgroup meta-analysis by dose of vitamin C administered singly or in combination with other supplements, follow-up period, methodological quality, cancer mortality, gender, smoking status, country, and type of cancer also showed no efficacy of vitamin C supplementation for cancer prevention. CONCLUSION: This meta-analysis shows that there is no evidence to support the use of vitamin C supplements for prevention of cancer.
Ascorbic Acid* ; Follow-Up Studies ; Mortality ; Smoke ; Smoking ; Vitamins*

The use of smartphones has rapidly increased over the past few years. With the increasing use of smartphones, concern has been raised about the potential harmful effects on human health. In 2011, the International Agency for Research on Cancer of the World Health Organization classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (group 2B) based on an increased risk for glioma associated with wireless phone use (i.e. mobile phones). In addition, several meta-analyses of case-control studies reported an increased risk of tumors associated with the use of mobile phones. Moreover, it has been reported that the overuse of mobile phones is associated with reproductive risks, addiction, and phantom vibration and ringing syndrome. Further large prospective cohort studies and randomized controlled trials are needed to confirm these associations. Until clear evidence is available that the use of smartphones is safe, their overuse should be avoided.
Case-Control Studies ; Cellular Phone ; Cohort Studies ; Electromagnetic Fields ; Glioma ; Humans ; International Agencies ; Vibration ; World Health Organization

No abstract available.
Primary Health Care*

PURPOSE: To evaluate the MR findings of knee injuries in skiing and to explain the mechanism of injury with MR findings. MATERIALS AND METHODS: We reviewed MR findings of 18 patients with history of knee injuries in skiing. The MR images were evaluated retrospectively to identify the ligament injuries, bone lesions and meniscal injuries. RESULTS: Ligament injuries were seen in 16 patients, bone contusions in 16 patients, meniscal lesions in two patients. The most common group of injury was anterior cruciate ligament (ACL) and roedial collateral ligament (MCL) injuries with bone contusion on posterior lip of the lateral tibial plateau (LTP). The second common group of injury was isolated ACL injury with bone contusions on the lateral fernoral condyle (LFC) and posterior lip of the LTP. We considered that the mechanism of injury of the former group may be correlated with the valgus torque with secondary anterior displacement of the tibia and the latter group may be correlated with the pivot shift phenomenon. CONCLUSION: MR may play an important role in the diagnosis of knee injuries in skiing and its findings may explain the mechanism of injury.
Anterior Cruciate Ligament ; Collateral Ligaments ; Contusions ; Diagnosis ; Humans ; Knee Injuries* ; Knee* ; Ligaments ; Lip ; Retrospective Studies ; Skiing* ; Tibia ; Torque

No abstract available.
Carcinoma, Basal Cell ; Facial Dermatoses* ; Keratosis, Actinic ; Skin*

No abstract available.
Herpes Simplex* ; Immunocompromised Host* ; Immunosuppression ; Simplexvirus*

PURPOSE: The purpose of this study was to investigate the level of cultural competency of visiting nurses and community health practitioners and explore factors that are related with their cultural competency. METHODS: The subjects of this study were 113 visiting nurses and 103 community health practitioners working in Gangwon-do. Data were collected using a structured questionnaire on May 24, 2011. The SPSS/WIN 17.0 program was used for data analysis. RESULTS: The average score for cultural competency of visiting nurses was 2.76+/-0.60 and that of community health practitioners 2.91+/-0.51. Most of subjects received no multicultural education (78.0% for nurses, 85.7% for community health nurses). Factors influencing cultural competency were number of service experience for multicultural clients and participation of multicultural education. CONCLUSION: It is necessary to develop systematic educational programs to enhance the cultural competency of nurses.
Community Health Nursing ; Cultural Competency ; Surveys and Questionnaires

No abstract available.
Porokeratosis*