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   203751篇
  免费   36253篇
  国内免费   2518篇
耳鼻咽喉   5604篇
儿科学   6790篇
妇产科学   3449篇
基础医学   10457篇
口腔科学   2452篇
临床医学   32489篇
内科学   57432篇
皮肤病学   8267篇
神经病学   19396篇
特种医学   8390篇
外科学   49665篇
综合类   1031篇
现状与发展   72篇
一般理论   59篇
预防医学   12530篇
眼科学   4550篇
药学   4976篇
  1篇
中国医学   62篇
肿瘤学   14850篇
  2024年   708篇
  2023年   5022篇
  2022年   1601篇
  2021年   4172篇
  2020年   6568篇
  2019年   3170篇
  2018年   8572篇
  2017年   8179篇
  2016年   9312篇
  2015年   9484篇
  2014年   17027篇
  2013年   17863篇
  2012年   9100篇
  2011年   9202篇
  2010年   12262篇
  2009年   15885篇
  2008年   9023篇
  2007年   7512篇
  2006年   9873篇
  2005年   7075篇
  2004年   6105篇
  2003年   4948篇
  2002年   4856篇
  2001年   4649篇
  2000年   3842篇
  1999年   4016篇
  1998年   4239篇
  1997年   3944篇
  1996年   3814篇
  1995年   3688篇
  1994年   2345篇
  1993年   1946篇
  1992年   1921篇
  1991年   1902篇
  1990年   1579篇
  1989年   1660篇
  1988年   1452篇
  1987年   1239篇
  1986年   1276篇
  1985年   1148篇
  1984年   923篇
  1983年   826篇
  1982年   769篇
  1981年   642篇
  1980年   591篇
  1979年   566篇
  1978年   567篇
  1977年   591篇
  1975年   472篇
  1972年   501篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
83.
Marielle Kabbouche MD  FAHS 《Headache》2015,55(10):1426-1429
Status migrainosus is defined by the international classification of headache disorders (ICHD) criteria as a debilitating migraine lasting more then 72 hours. The epidemiology of status migrainosus is still unknown in adult and children, and frequently underdiagnosed. Children and adolescents often end up in the emergency room with an intractable headache that failed outpatient therapy. Six to seven percent of these children do not respond to acute infusion therapy and require hospitalization. It is imperative that more aggressive therapy is considered when patients are affected by a severe intractable headache to prevent further disability and returning the child to baseline activity. Multiple therapies are available for adults and children. Studies for acute therapy in the emergency room are available in adults and pediatric groups. Small studies are available for inpatient therapy in children and, along with available therapies for children and adolescents, are described in this review. A review of the literature shows growing evidence regarding the use of dihydroergotamine intravenously once patients are hospitalized. Effectiveness and safety have been proven in the last decades in adults and small studies in the pediatric populations.  相似文献   
84.
85.
86.
87.
88.
89.
90.

Background

We have recently shown that human epididymis protein 4 (HE4) levels correlate with the severity of cystic fibrosis (CF) lung disease. However, there are no data on how HE4 levels alter in patients receiving CFTR modulating therapy.

Methods

In this retrospective clinical study, 3 independent CF patient cohorts (US-American: 29, Australian: 12 and Irish: 19 cases) were enrolled carrying at least one Class III CFTR CF-causing mutation (p.Gly551Asp) and being treated with CFTR potentiator ivacaftor. Plasma HE4 was measured by immunoassay before treatment (baseline) and 1–6?months after commencement of ivacaftor, and were correlated with FEV1 (% predicted), sweat chloride, C-reactive protein (CRP) and body mass index (BMI).

Results

After 1?month of therapy, HE4 levels were significantly lower than at baseline and remained decreased up to 6?months. A significant inverse correlation between absolute and delta values of HE4 and FEV1 (r?=??0.5376; P?<?.001 and r?=??0.3285; P?<?.001), was retrospectively observed in pooled groups, including an independent association of HE4 with FEV1 by multiple regression analysis (β?=??0.57, P?=?.019). Substantial area under the receiver operating characteristic curve (ROC-AUC) value was determined for HE4 when 7% mean change of FEV1 (0.722 [95% CI 0.581–0.863]; P?=?.029) were used as classifier, especially in the first 2?months of treatment (0.806 [95% CI 0.665–0.947]; P?<?.001).

Conclusions

This study shows that plasma HE4 levels inversely correlate with lung function improvement in CF patients receiving ivacaftor. Overall, this potential biomarker may be of value for routine clinical and laboratory follow-up of CFTR modulating therapy.  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