全文获取类型
收费全文 | 253580篇 |
免费 | 39293篇 |
国内免费 | 3121篇 |
专业分类
耳鼻咽喉 | 6373篇 |
儿科学 | 8561篇 |
妇产科学 | 5103篇 |
基础医学 | 17508篇 |
口腔科学 | 3856篇 |
临床医学 | 35783篇 |
内科学 | 69190篇 |
皮肤病学 | 9489篇 |
神经病学 | 24470篇 |
特种医学 | 10305篇 |
外国民族医学 | 24篇 |
外科学 | 55044篇 |
综合类 | 2130篇 |
现状与发展 | 72篇 |
一般理论 | 59篇 |
预防医学 | 13847篇 |
眼科学 | 5124篇 |
药学 | 9456篇 |
3篇 | |
中国医学 | 539篇 |
肿瘤学 | 19058篇 |
出版年
2023年 | 5114篇 |
2022年 | 1763篇 |
2021年 | 4974篇 |
2020年 | 7203篇 |
2019年 | 3941篇 |
2018年 | 9543篇 |
2017年 | 8938篇 |
2016年 | 10118篇 |
2015年 | 10370篇 |
2014年 | 18118篇 |
2013年 | 19561篇 |
2012年 | 10881篇 |
2011年 | 11027篇 |
2010年 | 13780篇 |
2009年 | 17221篇 |
2008年 | 10655篇 |
2007年 | 9129篇 |
2006年 | 11372篇 |
2005年 | 8470篇 |
2004年 | 8019篇 |
2003年 | 6813篇 |
2002年 | 6933篇 |
2001年 | 7779篇 |
2000年 | 6937篇 |
1999年 | 6421篇 |
1998年 | 4853篇 |
1997年 | 4409篇 |
1996年 | 4224篇 |
1995年 | 4055篇 |
1994年 | 2699篇 |
1993年 | 2283篇 |
1992年 | 3362篇 |
1991年 | 3372篇 |
1990年 | 2750篇 |
1989年 | 2787篇 |
1988年 | 2535篇 |
1987年 | 2238篇 |
1986年 | 2260篇 |
1985年 | 1927篇 |
1984年 | 1466篇 |
1983年 | 1373篇 |
1982年 | 1069篇 |
1981年 | 889篇 |
1980年 | 795篇 |
1979年 | 1042篇 |
1978年 | 867篇 |
1977年 | 852篇 |
1975年 | 818篇 |
1974年 | 827篇 |
1972年 | 783篇 |
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
51.
F. Giovanardi F. Nudo Q. Lai M. Garofalo A. Consolo E. Choppin De Janvry G.A. Arroyo Murillo P. Ursi D. Stabile F. Melandro P.B. Berloco R. Pretagostini L. Poli 《Transplantation proceedings》2019,51(1):128-131
Background
Arterial vascular anomalies in patients undergoing kidney transplantation (KT) are correlated with a higher incidence of early surgical complications, potentially causing graft loss. Arterial reconstruction allows patients to overcome these surgical challenges, thus minimizing the risk of poor outcomes. The aim of the present study is to retrospectively investigate the safety and effectiveness of the multiple arterial reconstruction technique with a Teflon patch in case of an unavailable aortic patch: to do so, surgical complications, graft function, and patient survival were evaluated.Methods
During the period January 2009 to August 2016, 202 adult deceased-donor KTs were performed at our center. Group A (n = 27; reconstruction of multiple arteries) and Group B (n = 175; control group) were compared.Results
No differences were observed between the 2 groups in terms of early postoperative course, with no vascular complication observed in Group A. No vascular patch infections were reported, nor longer cold ischemia time rates. Similarly, long-term survival rates were similar between the 2 groups.Conclusions
The Teflon-patch arterial reconstruction technique appears to be safe and effective, with an acceptable balance of benefits and potential risks of using a prosthetic material. Studies based on larger series are needed to further validate this approach. 相似文献52.
53.
54.
55.
Breast Elastography: How to Perform and Integrate Into a “Best-Practice” Patient Treatment Algorithm
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them. 相似文献
56.
57.
The term “oligometastatic prostate cancer” refers to a heterogeneous group of disease states currently defined solely on the basis of clinical features. Oligorecurrent disease, de novo oligometastases, and oligoprogressive disease likely have unique biologic underpinnings and natural histories. Evidence suggesting the existence of a subset of patients who harbor prostate cancer with limited metastatic potential currently includes disparate and overwhelmingly retrospective reports. Nevertheless, emerging prospective data have corroborated the “better-than-expected,” retrospectively observed outcomes, particularly in the setting of oligorecurrent prostate cancer. Improved functional imaging with prostate-specific membrane antigen-targeted strategies may enhance the identification of patients with oligometastatic prostate cancer in the short term. In the long term, refinement of the oligometastatic case definition likely will require biologic risk-stratification schemes. To determine optimal treatment strategies and identify patients most likely to benefit from metastasis-directed therapy, future efforts should focus on conducting high-quality, prospective trials with much-needed molecular correlative studies. 相似文献
58.
59.
60.
Paola Gilsanz Maria M. Corrada Claudia H. Kawas Elizabeth Rose Mayeda M. Maria Glymour Charles P. Quesenberry Catherine Lee Rachel A. Whitmer 《Alzheimer's & dementia》2019,15(4):497-505