全文获取类型
收费全文 | 47580篇 |
免费 | 7166篇 |
国内免费 | 137篇 |
专业分类
耳鼻咽喉 | 248篇 |
儿科学 | 1272篇 |
妇产科学 | 2235篇 |
基础医学 | 4547篇 |
口腔科学 | 472篇 |
临床医学 | 18627篇 |
内科学 | 7381篇 |
皮肤病学 | 549篇 |
神经病学 | 3885篇 |
特种医学 | 938篇 |
外科学 | 4138篇 |
综合类 | 253篇 |
一般理论 | 37篇 |
预防医学 | 4923篇 |
眼科学 | 614篇 |
药学 | 2159篇 |
中国医学 | 50篇 |
肿瘤学 | 2555篇 |
出版年
2024年 | 128篇 |
2023年 | 1070篇 |
2022年 | 665篇 |
2021年 | 1314篇 |
2020年 | 1292篇 |
2019年 | 1197篇 |
2018年 | 2050篇 |
2017年 | 2093篇 |
2016年 | 2259篇 |
2015年 | 2397篇 |
2014年 | 2665篇 |
2013年 | 3392篇 |
2012年 | 2848篇 |
2011年 | 3097篇 |
2010年 | 2243篇 |
2009年 | 2439篇 |
2008年 | 2525篇 |
2007年 | 2385篇 |
2006年 | 2290篇 |
2005年 | 2170篇 |
2004年 | 1973篇 |
2003年 | 1744篇 |
2002年 | 1540篇 |
2001年 | 729篇 |
2000年 | 471篇 |
1999年 | 621篇 |
1998年 | 777篇 |
1997年 | 852篇 |
1996年 | 754篇 |
1995年 | 686篇 |
1994年 | 500篇 |
1993年 | 417篇 |
1992年 | 322篇 |
1991年 | 308篇 |
1990年 | 295篇 |
1989年 | 247篇 |
1988年 | 188篇 |
1987年 | 184篇 |
1986年 | 170篇 |
1985年 | 186篇 |
1984年 | 145篇 |
1983年 | 143篇 |
1982年 | 121篇 |
1981年 | 127篇 |
1980年 | 86篇 |
1979年 | 111篇 |
1978年 | 81篇 |
1977年 | 87篇 |
1976年 | 85篇 |
1972年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Georg Prokop Benedikt Wiestler Daniel Hieber Fynn Withake Karoline Mayer Jens Gempt Claire Delbridge Friederike Schmidt-Graf Nicole Pfarr Bruno Märkl Jürgen Schlegel Friederike Liesche-Starnecker 《International journal of cancer. Journal international du cancer》2023,153(9):1658-1670
Intratumor heterogeneity is a main cause of the dismal prognosis of glioblastoma (GBM). Yet, there remains a lack of a uniform assessment of the degree of heterogeneity. With a multiscale approach, we addressed the hypothesis that intratumor heterogeneity exists on different levels comprising traditional regional analyses, but also innovative methods including computer-assisted analysis of tumor morphology combined with epigenomic data. With this aim, 157 biopsies of 37 patients with therapy-naive IDH-wildtype GBM were analyzed regarding the intratumor variance of protein expression of glial marker GFAP, microglia marker Iba1 and proliferation marker Mib1. Hematoxylin and eosin stained slides were evaluated for tumor vascularization. For the estimation of pixel intensity and nuclear profiling, automated analysis was used. Additionally, DNA methylation profiling was conducted separately for the single biopsies. Scoring systems were established to integrate several parameters into one score for the four examined modalities of heterogeneity (regional, cellular, pixel-level and epigenomic). As a result, we could show that heterogeneity was detected in all four modalities. Furthermore, for the regional, cellular and epigenomic level, we confirmed the results of earlier studies stating that a higher degree of heterogeneity is associated with poorer overall survival. To integrate all modalities into one score, we designed a predictor of longer survival, which showed a highly significant separation regarding the OS. In conclusion, multiscale intratumor heterogeneity exists in glioblastoma and its degree has an impact on overall survival. In future studies, the implementation of a broadly feasible heterogeneity index should be considered. 相似文献
2.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献
3.
4.
5.
6.
7.
Well‐being,health and fitness of children who use wheelchairs: Feasibility study protocol to develop child‐centred ‘keep‐fit’ exercise interventions
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
8.
Interprofessional collaboration and communication in nursing homes: a qualitative exploration of problems in medical care for nursing home residents – study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
9.