首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   128篇
  免费   11篇
耳鼻咽喉   1篇
儿科学   5篇
妇产科学   4篇
基础医学   25篇
口腔科学   1篇
临床医学   6篇
内科学   18篇
皮肤病学   1篇
神经病学   5篇
特种医学   2篇
外科学   12篇
综合类   1篇
预防医学   10篇
眼科学   9篇
药学   10篇
中国医学   4篇
肿瘤学   25篇
  2023年   1篇
  2022年   3篇
  2020年   2篇
  2019年   1篇
  2018年   1篇
  2017年   2篇
  2016年   3篇
  2015年   4篇
  2014年   6篇
  2013年   9篇
  2012年   12篇
  2011年   13篇
  2010年   5篇
  2009年   4篇
  2008年   7篇
  2007年   10篇
  2006年   11篇
  2005年   9篇
  2004年   10篇
  2003年   6篇
  2002年   8篇
  2001年   2篇
  2000年   2篇
  1999年   1篇
  1998年   1篇
  1997年   3篇
  1990年   2篇
  1987年   1篇
排序方式: 共有139条查询结果,搜索用时 31 毫秒
21.
We piloted a low-cost approach to measure the disease burden of Streptococcus pneumoniae, Hib and Salmonella Typhi by leveraging the existing infrastructure of high performing microbiology laboratories at two large paediatric hospitals in Dhaka Bangladesh, and assessing the hospital utilization of the catchment population of these hospitals for different syndromes. S. Typhi was the most common bacterium identified in culture and accounted for an estimated 211 hospitalizations per 100,000 children <5 years of age per year. Meningitis due to S. pneumoniae was the most common cause of mortality accounting for 8.0 deaths per 100,000 children <5 years of age per year. This low-cost approach can provide data to support vaccine introduction and the health impact of newly introduced vaccines.  相似文献   
22.
The effect of aqueous and alcohol extracts of the fruits and leaves of Pongamia pinnata (Linn.) Merr. (Syn. Pongamia glabra Vent, leguminosae) on the spontaneous movements of both the whole worm and the nerve-muscle preparation of Setaria cervi and on the survival of micro fi lariae in vitro was studied. The aqueous and alcohol extracts of fruits and the alcohol extract of leaves caused an inhibition of spontaneous movements of the whole worm and the nerve-muscle preparation of S. cervi. The initial stimulatory effect was not observed with the aqueous extract of fruits on the nerve-muscle preparation. The concentration required to inhibit the movements of the whole worm preparation was 250 micro g/mL for aqueous, 120 micro g/mL for alcohol extract of fruits and 270 microgram/mL for alcohol extracts of the leaves. The concentrations of P. pinnata extracts required to produce an equivalent effect on the nerve-muscle preparation were 25 micro g/mL, 5 micro g/mL and 20 micro g/mL, respectively, suggesting a cuticular permeability barrier.  相似文献   
23.
Objective : This prospective study was carried out from July-December 1999 to see the status of zinc in CSF of children with febrile convulsion and to compare this to that of control.Methods : Forty-two cases of febrile convulsion and 30 controls (fever without convulsion) were enrolled into the study. CSF zinc was estimated by atomic absorption spectrophotometry (AAS) in Atomic Energy Center, Dhaka and compared between the two groups.Results : The mean zinc level in CSF in the study sample was 40.19mgm/L and that in control was 74.98mgm/L This difference was statistically significant (p<0.001).Conclusion : The study concludes that a significantly lower of zinc exists in CSF of children with febrile. However no relationship was found between CSF zinc status with age, sex, degree & duration of fever and time of lumbar puncture after convulsion.  相似文献   
24.

Objectives

To evaluate the long-term cost-effectiveness of germline BRCA1 and BRCA2 (collectively termed “BRCA”) testing in women with epithelial ovarian cancer, and testing for the relevant mutation in first- and second-degree relatives of BRCA mutation–positive individuals, compared with no testing. Female BRCA mutation–positive relatives of patients with ovarian cancer could undergo risk-reducing mastectomy and/or bilateral salpingo-oophorectomy.

Methods

A cost-effectiveness model was developed that included the risks of breast and ovarian cancer; the costs, utilities, and effects of risk-reducing surgery on cancer rates; and the costs, utilities, and mortality rates associated with cancer.

Results

BRCA testing of all women with epithelial ovarian cancer each year is cost-effective at a UK willingness-to-pay threshold of £20,000/quality-adjusted life-year (QALY) compared with no testing, with an incremental cost-effectiveness ratio of £4,339/QALY. The result was primarily driven by fewer cases of breast cancer (142) and ovarian cancer (141) and associated reductions in mortality (77 fewer deaths) in relatives over the subsequent 50 years. Sensitivity analyses showed that the results were robust to variations in the input parameters. Probabilistic sensitivity analysis showed that the probability of germline BRCA mutation testing being cost-effective at a threshold of £20,000/QALY was 99.9%.

Conclusions

Implementing germline BRCA testing in all patients with ovarian cancer would be cost-effective in the United Kingdom. The consequent reduction in future cases of breast and ovarian cancer in relatives of mutation–positive individuals would ease the burden of cancer treatments in subsequent years and result in significantly better outcomes and reduced mortality rates for these individuals.  相似文献   
25.
Between 2009 and 2014, the International Community of Women Living with HIV in Latin America and the Mexican feminist civil society organization Balance coordinated a five-country community-led intervention that brought together women living with HIV (WLHIV), trans women, sex workers, and feminist lawyers to document and respond to sexual and reproductive health and rights (SRHR) violations of WLHIV and advocate for legal, policy, and programmatic changes to fulfill SRHR. The experiences of involved community leaders (n=26) indicate that knowledge of national, regional, and international human rights commitments and up-to-date medical information positively influenced personal health behaviors, empowered WLHIV as subject matter experts, and emboldened them to hold duty-bearers to account. The research evidence generated through collective action was critical for legitimating SRHR violations of WLHIV with decision-makers and for positioning the issue in the advocacy agendas of national and regional HIV and women’s movements. Collective action contributed to social cohesion among diverse groups of women living with and affected by HIV and increased available technical, financial, and organizational resources and political opportunities by linking organizations and networks. Collectively, community leaders mobilized to influence policy, legal frameworks, and service delivery to promote and protect the SRHR of WLHIV.  相似文献   
26.
27.
28.
29.
Somatic defects at five loci, WT1, CTNNB1, WTX, TP53 and the imprinted 11p15 region, are implicated in Wilms tumor, the commonest childhood kidney cancer. In this study we analysed all five loci in 120 Wilms tumors. We identified epigenetic 11p15 abnormalities in 69% of tumors, 37% were H19 epimutations and 32% were paternal uniparental disomy (pUPD). We identified mutations of WTX in 32%, CTNNB1 in 15%, WT1 in 12% and TP53 in 5% of tumors. We identified several significant associations: between 11p15 and WTX (P=0.007), between WT1 and CTNNB1 (P less than 0.001), between WT1 and pUPD 11p15 (P=0.01), and a strong negative association between WT1 and H19 epimutation (P less than 0.001). We next used these data to stratify Wilms tumor into three molecular Groups, based on the status at 11p15 and WT1. Group 1 tumors (63%) were defined as 11p15-mutant and WT1-normal; a third also had WTX mutations. Group 2 tumors (13%) were WT1-mutant. They either had 11p15 pUPD or were 11p15-normal. Almost all had CTNNB1 mutations but none had H19 epimutation. Group 3 tumors (25%) were defined as 11p15-normal and WT1-normal and were typically normal at all five loci (P less than 0.001). We also identified a novel clinical association between H19 epimutation and bilateral disease (P less than 0.001). These data provide new insights into the pattern, order, interactions and clinical associations of molecular events in Wilms tumor.  相似文献   
30.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号