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   118956篇
  免费   6255篇
  国内免费   196篇
耳鼻咽喉   1784篇
儿科学   5229篇
妇产科学   3961篇
基础医学   16468篇
口腔科学   2900篇
临床医学   8538篇
内科学   22575篇
皮肤病学   3526篇
神经病学   9215篇
特种医学   5126篇
外国民族医学   32篇
外科学   19377篇
综合类   1719篇
一般理论   29篇
预防医学   6027篇
眼科学   3457篇
药学   8358篇
  1篇
中国医学   372篇
肿瘤学   6713篇
  2018年   968篇
  2017年   852篇
  2016年   1186篇
  2015年   1326篇
  2014年   1752篇
  2013年   2518篇
  2012年   3334篇
  2011年   3359篇
  2010年   2097篇
  2009年   2028篇
  2008年   3418篇
  2007年   3653篇
  2006年   3756篇
  2005年   3908篇
  2004年   3832篇
  2003年   3676篇
  2002年   3619篇
  2001年   7103篇
  2000年   7025篇
  1999年   5916篇
  1998年   1642篇
  1997年   1578篇
  1996年   1345篇
  1995年   1217篇
  1994年   1109篇
  1993年   1125篇
  1992年   3802篇
  1991年   3603篇
  1990年   3579篇
  1989年   3363篇
  1988年   3012篇
  1987年   2916篇
  1986年   2822篇
  1985年   2630篇
  1984年   1953篇
  1983年   1605篇
  1982年   936篇
  1981年   924篇
  1980年   773篇
  1979年   1830篇
  1978年   1351篇
  1977年   1122篇
  1976年   948篇
  1975年   1186篇
  1974年   1217篇
  1973年   1206篇
  1972年   1062篇
  1971年   982篇
  1970年   896篇
  1969年   797篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
7.
TL1A is a TNF‐like cytokine which has been shown to co‐stimulate TH1 and TH17 responses during chronic inflammation. The expression of this novel cytokine has been investigated in inflammatory disorders like rheumatoid arthritis and inflammatory bowel disease, but little is known about expression and induction in psoriasis. Indeed, the pathogenesis in psoriasis is still not fully understood and it is speculated that cytokines other than TNF‐α are important in subsets of patients. Also, for patients with severe disease that are treated with systemic anti‐TNF‐α blockade, novel candidates to be used as disease and response biomarkers are of high interest. Here, we demonstrate TL1A expression in biopsies from psoriatic lesions. Also, we investigated spontaneous and induced TL1A secretion from PBMCs and blood levels from a cohort of psoriasis patients. Here, increased spontaneous secretion from PBMCs was observed as compared to healthy controls and a small subset of patients had highly elevated TL1A in the blood. Interestingly, activation of PBMCs with various cytokines showed a decreased sensitivity for TL1A activation in psoriasis patients compared to healthy controls.TL1A levels in blood and biopsies could not be correlated with disease activity with this patient cohort. Thus, additional large‐scale studies are warranted to investigate TL1A as a biomarker.  相似文献   
8.
9.
Hillermann  T.  Homburg  K.  Rainer  M.  Budde  U. 《Der Anaesthesist》2022,71(4):299-302
Die Anaesthesiologie - Eine junge Patientin erleidet während der Anlage einer axillären Plexusblockade einen generalisierten Krampfanfall. Die Mechanismen, im Wesentlichen die vermutlich...  相似文献   
10.

Objective

Low psoas muscle area is shown to be an indicator for worse postoperative outcome in patients undergoing vascular surgical. Additionally, it has been associated with longer durations of hospital stay in patients with cancer who undergo surgery and subsequently greater health care costs in Europe and the United States. We sought to evaluate this effect on hospital expenditure for patients undergoing vascular repair in a health care system with universal access.

Methods

Skeletal muscle mass was assessed on preoperative abdominal computed tomography scans of patients undergoing open aortic aneurysm repair in a retrospective fashion. The skeletal muscle index (SMI) was used to define low muscle mass. Health care costs were obtained for all patients and the relationship between a low SMI and higher costs was explored using linear regression and cross-sectional analysis.

Results

We included 156 patients (81.5% male) with a median age of 72 years undergoing elective surgery for infrarenal abdominal aortic aneurysm in this analysis. The median SMI for patients with low skeletal muscle mass was 53.21 cm2/kg and for patients without, 70.07 cm2/kg. Hospital duration of stay was 2 days longer in patients with low skeletal muscle mass as compared with patients with normal (14 days vs 11 days; P = .001), as was duration of intensive care stay (3 days vs 1 day; P = .01). The median overall hospital costs were €10,460 higher for patients with a low SMI as compared with patients with a normal physical constitution (€53,739 [interquartile range, €45,007-€62,471] vs €43,279 [interquartile range, €39,509-€47,049]; P = .001). After confounder adjustment, a low SMI was associated with a 14.68% cost increase in overall hospital costs, for a cost increase of €6521.

Conclusions

Low skeletal muscle mass is independently associated with higher hospital as well as intensive care costs in patients undergoing elective aortic aneurysm repair. Strategies to reduce this risk factor are warranted for these patients.  相似文献   
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