全文获取类型
收费全文 | 134993篇 |
免费 | 14406篇 |
国内免费 | 9036篇 |
专业分类
耳鼻咽喉 | 977篇 |
儿科学 | 2107篇 |
妇产科学 | 1510篇 |
基础医学 | 13040篇 |
口腔科学 | 2526篇 |
临床医学 | 18435篇 |
内科学 | 17096篇 |
皮肤病学 | 1322篇 |
神经病学 | 5445篇 |
特种医学 | 4725篇 |
外国民族医学 | 57篇 |
外科学 | 10538篇 |
综合类 | 28057篇 |
现状与发展 | 44篇 |
一般理论 | 4篇 |
预防医学 | 12144篇 |
眼科学 | 3657篇 |
药学 | 15994篇 |
202篇 | |
中国医学 | 10551篇 |
肿瘤学 | 10004篇 |
出版年
2024年 | 689篇 |
2023年 | 2265篇 |
2022年 | 5613篇 |
2021年 | 7019篇 |
2020年 | 5936篇 |
2019年 | 4313篇 |
2018年 | 4422篇 |
2017年 | 4898篇 |
2016年 | 4098篇 |
2015年 | 6624篇 |
2014年 | 8093篇 |
2013年 | 8327篇 |
2012年 | 12014篇 |
2011年 | 12721篇 |
2010年 | 8990篇 |
2009年 | 7330篇 |
2008年 | 8422篇 |
2007年 | 7960篇 |
2006年 | 7297篇 |
2005年 | 6180篇 |
2004年 | 4188篇 |
2003年 | 3913篇 |
2002年 | 3040篇 |
2001年 | 2430篇 |
2000年 | 2182篇 |
1999年 | 1883篇 |
1998年 | 1058篇 |
1997年 | 1087篇 |
1996年 | 802篇 |
1995年 | 767篇 |
1994年 | 644篇 |
1993年 | 397篇 |
1992年 | 400篇 |
1991年 | 398篇 |
1990年 | 361篇 |
1989年 | 296篇 |
1988年 | 273篇 |
1987年 | 248篇 |
1986年 | 202篇 |
1985年 | 147篇 |
1984年 | 108篇 |
1983年 | 80篇 |
1982年 | 37篇 |
1981年 | 52篇 |
1980年 | 33篇 |
1979年 | 42篇 |
1978年 | 28篇 |
1977年 | 24篇 |
1976年 | 20篇 |
1970年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Assessment of Myocardial Infarct Size by Three‐Dimensional and Two‐Dimensional Speckle Tracking Echocardiography: A Comparative Study to Single Photon Emission Computed Tomography 下载免费PDF全文
5.
Xiujuan Tian Zhiying Chen Shaomin Shi Xianwen Wang Wanli Wang Ning Li Jing Wang 《Medicine》2015,94(37)
Oral cancer, predominantly oral squamous cell carcinoma (OSCC), is one of the most leading causes of cancers worldwide. Due to a low 5-year survival rate, highly effective methods for the early detection of OSCC are totally needed. MicroRNAs (miRNAs), as promising biomarkers, can bring insights into tumorigenesis of oral cancers. However, studies on the accuracy of miRNAs detection in OSCC have inconsistent conclusions, leading us to conduct this meta-analysis. The aim of this study was to systematically review the articles investigating the diagnostic value of miRNAs in OSCC.The PubMed, Embase, Chinese National Knowledge Infrastructure (CNKI), Web of Science were searched (updated to June 11th, 2015) to identify all articles evaluating the diagnostic yield of miRNAs for OSCC. The pooled sensitivity, specificity, and other diagnostic parameters were used to assess the performance of miRNAs assays on OSCC detection. Statistical analysis was conducted by employing the R software.The present meta-analysis comprised 23 studies from 10 articles, including 598 OSCC patients and 320 healthy individuals, available for analysis. The summary receiver operator characteristic (SROC) curve was plotted. Meanwhile, the pooled diagnostic parameters and the area under curve (AUC) were calculated based on all included studies. The pooled diagnostic parameters calculated from all 23 studies were as follows: pooled sensitivity of 0.759 (95% CI: 0.701–0.809), pooled specificity of 0.773 (95% CI: 0.713–0.823) and AUC of 0.832, which indicates a relatively high diagnostic accuracy of miRNAs in differentiating OSCC patients from healthy controls. Meanwhile, In addition, subgroup analyses were conducted to access the heterogeneity between studies, which is based on specimen (serum/plasma/blood/saliva/ tissue) and ethnicity (Asian/Caucasian).In summary, our meta-analysis suggests that miRNAs might be used in noninvasive screening tests for OSCC, which needs further large-scale studies to be validated. 相似文献
6.
7.
8.
9.
PNPLA3 gene polymorphism and response to lifestyle modification in patients with nonalcoholic fatty liver disease 下载免费PDF全文
10.