全文获取类型
收费全文 | 2619篇 |
免费 | 154篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 34篇 |
儿科学 | 46篇 |
妇产科学 | 19篇 |
基础医学 | 406篇 |
口腔科学 | 54篇 |
临床医学 | 185篇 |
内科学 | 631篇 |
皮肤病学 | 20篇 |
神经病学 | 334篇 |
特种医学 | 86篇 |
外科学 | 467篇 |
综合类 | 20篇 |
预防医学 | 153篇 |
眼科学 | 50篇 |
药学 | 123篇 |
肿瘤学 | 155篇 |
出版年
2023年 | 16篇 |
2021年 | 42篇 |
2020年 | 46篇 |
2019年 | 40篇 |
2018年 | 47篇 |
2017年 | 31篇 |
2016年 | 38篇 |
2015年 | 43篇 |
2014年 | 57篇 |
2013年 | 84篇 |
2012年 | 132篇 |
2011年 | 133篇 |
2010年 | 77篇 |
2009年 | 86篇 |
2008年 | 135篇 |
2007年 | 116篇 |
2006年 | 108篇 |
2005年 | 133篇 |
2004年 | 126篇 |
2003年 | 151篇 |
2002年 | 126篇 |
2001年 | 92篇 |
2000年 | 56篇 |
1999年 | 60篇 |
1998年 | 22篇 |
1997年 | 35篇 |
1996年 | 36篇 |
1995年 | 26篇 |
1993年 | 17篇 |
1992年 | 27篇 |
1991年 | 49篇 |
1990年 | 31篇 |
1989年 | 36篇 |
1988年 | 30篇 |
1987年 | 19篇 |
1986年 | 27篇 |
1985年 | 30篇 |
1984年 | 21篇 |
1983年 | 23篇 |
1982年 | 27篇 |
1981年 | 35篇 |
1980年 | 24篇 |
1979年 | 20篇 |
1978年 | 15篇 |
1977年 | 20篇 |
1976年 | 18篇 |
1975年 | 13篇 |
1974年 | 28篇 |
1973年 | 14篇 |
1970年 | 19篇 |
排序方式: 共有2783条查询结果,搜索用时 31 毫秒
61.
62.
63.
64.
65.
Stage IV Gastro‐Entero‐Pancreatic Neuroendocrine Neoplasms: A Risk Score to Predict Clinical Outcome
下载免费PDF全文
![点击此处可从《The oncologist》网站下载免费的PDF全文](/ch/ext_images/free.gif)
66.
B. Bertram K.-D. Lemmen H. Agostini F. Ziemssen H.-P. Hammes R. Landgraf 《Der Diabetologe》2016,12(7):509-521
In September 2015 a revised version of the guideline “Prevention and therapy of diabetes-induced retinal complications” was released in Germany. It summarizes current recommendations for diagnosis and therapy of diabetic retinopathy with a special focus on practicability in daily routine. Newly included were the use of optical coherence tomography (OCT) for the diagnosis of diabetic macular edema and the evaluation of the therapeutic effect of anti-VEGF drugs (VEGF: vascular endothelial growth factor) or corticosteroids after intravitreal drug delivery. Screening intervals for diabetic retinopathy were extended to every 2 years for all diabetic patients with no retinopathy and limited systemic risk factors. Patients with known risk factors should be screened annually or in case of retinopathy, followed-up as recommended by the ophthalmologist. 相似文献
67.
Using protein chromatography, we purified and identified human prothrombin from human plasma as antiangiogenic. Prothrombin significantly inhibited endothelial cell tube formation in vitro at 10 microg/ml. Importantly, it also inhibited bFGF-induced angiogenesis in Matrigel-plug assays performed in mice. The proteolytic activity of thrombin appeared to be critical for the antiangiogenic activity of prothrombin. For example, thrombin exhibited inhibitory effects on endothelial cell tube formation in vitro at 10 U/ml. Addition of lepirudin, a specific inhibitor of thrombin, completely blocked prothrombin's and thrombin's antiangiogenic effects in vitro. We also assessed the importance of thrombin receptors in angiogenesis. Using small peptides that activate different protease-activated receptors (PARs), we showed that activation of PAR-1 led to inhibition of endothelial cell tube formation in vitro and bFGF-induced angiogenesis in vivo. Collectively, our data suggest that thrombin's proteolytic activity can be antiangiogenic. 相似文献
68.
69.
Burcin
zdirik Henning Jann Philip Bischoff Uli Fehrenbach Frank Tacke Christoph Roderburg Bertram Wiedenmann 《Medicine》2021,100(1)
Immune check-point inhibitors (ICIs) have changed our view on how to treat cancer. Despite their approval in treatment of many different cancers, efficacy of immune check-point inhibitors (ICI) in neuroendocrine neoplasia is limited and poorly understood. Established treatment options of neuroendocrine tumors (NET) and neuroendocrine carcinomas (NECs) are based on surgery, tumor-targeted medical treatments, Peptide Receptor Radionuclide Therapy (PRRT), and locoregional therapies. However, in many patients these treatments lose efficacy over time, and novel therapies are urgently needed. We report on 8 patients diagnosed with neuroendocrine neoplasms (NEN) that were treated with ICI (pembrolizumab, avelumab, nivolumab plus ipilimumab) as salvage therapy. In this cohort, we observed tumor response with partial remission in 3 patients and stable disease in 1 patient. Four patients showed progressive disease. Of note, responses were observed both in PD-L1 positive and PD-L1 negative patients. Here, we discuss clinical courses of these patients in the context of available literature to highlight limitations and drawbacks currently preventing the use of ICI in routine management of patients with NEN. 相似文献
70.
Lars Nyberg Fredrik Magnussen Anders Lundquist William Baar David Bartrs-Faz Lars Bertram C. J. Boraxbekk Andreas M. Brandmaier Christian A. Drevon Klaus Ebmeier Paolo Ghisletta Richard N. Henson Carme Junqu Rogier Kievit Maike Kleemeyer Ethan Knights Simone Kühn Ulman Lindenberger Brenda W. J. H. Penninx Sara Pudas
ystein Srensen Lídia Vaqu-Alczar Kristine B. Walhovd Anders M. Fjell 《Proceedings of the National Academy of Sciences of the United States of America》2021,118(18)
Education has been related to various advantageous lifetime outcomes. Here, using longitudinal structural MRI data (4,422 observations), we tested the influential hypothesis that higher education translates into slower rates of brain aging. Cross-sectionally, education was modestly associated with regional cortical volume. However, despite marked mean atrophy in the cortex and hippocampus, education did not influence rates of change. The results were replicated across two independent samples. Our findings challenge the view that higher education slows brain aging. 相似文献