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   1017972篇
  免费   78359篇
  国内免费   2680篇
耳鼻咽喉   13215篇
儿科学   34975篇
妇产科学   28884篇
基础医学   148367篇
口腔科学   28408篇
临床医学   92786篇
内科学   197857篇
皮肤病学   23104篇
神经病学   81505篇
特种医学   39245篇
外国民族医学   306篇
外科学   152168篇
综合类   24046篇
一般理论   408篇
预防医学   79618篇
眼科学   23060篇
药学   73737篇
  3篇
中国医学   2046篇
肿瘤学   55273篇
  2018年   10882篇
  2017年   8536篇
  2016年   9731篇
  2015年   11039篇
  2014年   15031篇
  2013年   22934篇
  2012年   30415篇
  2011年   32395篇
  2010年   19421篇
  2009年   18237篇
  2008年   30303篇
  2007年   31935篇
  2006年   32413篇
  2005年   31178篇
  2004年   30330篇
  2003年   29172篇
  2002年   28118篇
  2001年   47192篇
  2000年   48215篇
  1999年   40541篇
  1998年   11506篇
  1997年   10350篇
  1996年   10408篇
  1995年   10008篇
  1994年   9282篇
  1993年   8645篇
  1992年   32400篇
  1991年   31602篇
  1990年   31125篇
  1989年   30002篇
  1988年   27288篇
  1987年   27434篇
  1986年   25551篇
  1985年   24722篇
  1984年   18542篇
  1983年   15659篇
  1982年   9464篇
  1981年   8529篇
  1979年   16947篇
  1978年   12326篇
  1977年   10415篇
  1976年   9826篇
  1975年   10256篇
  1974年   12380篇
  1973年   11894篇
  1972年   10931篇
  1971年   10154篇
  1970年   9404篇
  1969年   8752篇
  1968年   8130篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.

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   
62.
63.
ObjectivesTo fill an empirical gap in the literature by examining changes in quality of care measures occurring when multispecialty clinic systems were acquired by hospital-owned, vertically integrated health care delivery systems in the Twin Cities area.ConclusionsMoving a clinic system into a vertically integrated delivery system resulted in limited increases in quality of care indicators. Caution is warranted when the acquisition causes disruption in referral patterns.  相似文献   
64.
65.
66.
Clinical Rheumatology - Prof. Ari Polachek on of the author of the published version of this article missed to add his second affiliation which is the Department of Rheumatology, Tel Aviv Sourasky...  相似文献   
67.
68.
Contrast‐enhanced spectral mammography (CESM) has a number of uses including the work‐up of inconclusive findings on mammography, assessment of breast symptoms, cancer staging, evaluation of response to neoadjuvant chemotherapy and recently as an alternative to magnetic resonance imaging (MRI) in high‐risk screening. CESM can be swiftly incorporated into the workflow of busy breast clinics. We share our experiences with CESM at a large breast assessment centre in Western Australia.  相似文献   
69.
Hypertrophic lichen planus (HLP) is a T‐cell‐mediated process typically presenting with hypertrophic or verrucous plaques on the lower limbs. We report the case of a 24‐year‐old woman with a history of HLP since age 3 years presenting with rapid malignant transformation of one lesion into a large squamous cell carcinoma (SCC). Subsequent examination revealed progressive, widespread metastatic involvement, and the patient ultimately died from her disease. SCC associated with HLP is rare, with a review of the literature revealing fewer than 50 cases. This case highlights the need to be aware of suspicious changes in HLP and to educate patients as to when to be reevaluated.  相似文献   
70.
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