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   2350305篇
  免费   171221篇
  国内免费   3331篇
耳鼻咽喉   32049篇
儿科学   75893篇
妇产科学   62685篇
基础医学   348180篇
口腔科学   63636篇
临床医学   211354篇
内科学   457320篇
皮肤病学   51727篇
神经病学   185279篇
特种医学   88007篇
外国民族医学   489篇
外科学   353888篇
综合类   47510篇
现状与发展   12篇
一般理论   848篇
预防医学   182734篇
眼科学   54331篇
药学   175115篇
  11篇
中国医学   4575篇
肿瘤学   129214篇
  2021年   18989篇
  2019年   19540篇
  2018年   27059篇
  2017年   20357篇
  2016年   22748篇
  2015年   25639篇
  2014年   36095篇
  2013年   53954篇
  2012年   74679篇
  2011年   79413篇
  2010年   47060篇
  2009年   44564篇
  2008年   74615篇
  2007年   79487篇
  2006年   80301篇
  2005年   77790篇
  2004年   74370篇
  2003年   71695篇
  2002年   69364篇
  2001年   108739篇
  2000年   111450篇
  1999年   93495篇
  1998年   26990篇
  1997年   23659篇
  1996年   24054篇
  1995年   22715篇
  1994年   20893篇
  1993年   19712篇
  1992年   72004篇
  1991年   70073篇
  1990年   68396篇
  1989年   65667篇
  1988年   60307篇
  1987年   59129篇
  1986年   55222篇
  1985年   53007篇
  1984年   39313篇
  1983年   33396篇
  1982年   19859篇
  1979年   35869篇
  1978年   25651篇
  1977年   21232篇
  1976年   20334篇
  1975年   21816篇
  1974年   26148篇
  1973年   24802篇
  1972年   23200篇
  1971年   22037篇
  1970年   20249篇
  1969年   19316篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.

Background

The ZOE-50 (NCT01165177) and ZOE-70 (NCT01165229) phase 3 clinical trials showed that the adjuvanted recombinant zoster vaccine (RZV) was ≥90% efficacious in preventing herpes zoster in adults. Here we present a comprehensive overview of the safety data from these studies.

Methods

Adults aged ≥50 (ZOE-50) and ≥70 (ZOE-70) years were randomly vaccinated with RZV or placebo. Safety analyses were performed on the pooled total vaccinated cohort, consisting of participants receiving at least one dose of RZV or placebo. Solicited and unsolicited adverse events (AEs) were collected for 7 and 30?days after each vaccination, respectively. Serious AEs (SAEs) were collected from the first vaccination until 12?months post-last dose. Fatal AEs, vaccination-related SAEs, and potential immune-mediated diseases (pIMDs) were collected during the entire study period.

Results

Safety was evaluated in 14,645 RZV and 14,660 placebo recipients. More RZV than placebo recipients reported unsolicited AEs (50.5% versus 32.0%); the difference was driven by transient injection site and solicited systemic reactions that were generally seen in the first week post-vaccination. The occurrence of overall SAEs (RZV: 10.1%; Placebo: 10.4%), fatal AEs (RZV: 4.3%; Placebo: 4.6%), and pIMDs (RZV: 1.2%; Placebo: 1.4%) was balanced between groups. The occurrence of possible exacerbations of pIMDs was rare and similar between groups. Overall, except for the expected local and systemic symptoms, the safety results were comparable between the RZV and Placebo groups irrespective of participant age, gender, or race.

Conclusions

No safety concerns arose, supporting the favorable benefit-risk profile of RZV.  相似文献   
93.
The Impella 5.0, a percutaneously inserted left ventricular assist device, has been used to support patients who have severe heart failure or who are undergoing high-risk percutaneous coronary intervention. We report our surgical placement of the Impella 5.0, through a graft sewn to the aorta, to unload the left ventricle of a 59-year-old man who was undergoing venoarterial extracorporeal membrane oxygenation for postcardiotomy shock. The patient underwent successful placement of a long-term left ventricular assist device before his discharge from the hospital. The versatility of the Impella 5.0 is exemplified in this patient who was successfully bridged to long-term support.  相似文献   
94.
The jobs of Latino manual laborers place their mental and physical health at risk. This study evaluates the associations among musculoskeletal pain, mental health, and work organization in Latino manual laborers. Farmworkers and nonfarmworkers (n = 189) in North Carolina were interviewed for self-reported musculoskeletal pain, depressive symptoms, stress, work safety climate, and precarious job status. More nonfarmworkers than farmworkers had neck and shoulder pain, but they did not differ in other areas of musculoskeletal pain. Depressive symptoms had a significant association with neck and shoulder pain (p < .05). Precariousness had a significant association with back pain (p < .05). Farmworker participants had H-2A visas and were afforded some protection compared to nonfarmworker manual workers. Research is needed to improve policy that relieves pain and improves mental health for all Latino manual workers.  相似文献   
95.
96.
97.
98.
99.
100.
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