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   61796篇
  免费   4910篇
  国内免费   171篇
耳鼻咽喉   490篇
儿科学   2507篇
妇产科学   1849篇
基础医学   8594篇
口腔科学   854篇
临床医学   7971篇
内科学   11176篇
皮肤病学   1013篇
神经病学   6823篇
特种医学   1279篇
外科学   6166篇
综合类   872篇
一般理论   86篇
预防医学   7648篇
眼科学   1185篇
药学   3905篇
中国医学   106篇
肿瘤学   4353篇
  2023年   490篇
  2022年   741篇
  2021年   1502篇
  2020年   985篇
  2019年   1610篇
  2018年   1759篇
  2017年   1265篇
  2016年   1384篇
  2015年   1502篇
  2014年   2144篇
  2013年   3117篇
  2012年   4567篇
  2011年   4673篇
  2010年   2572篇
  2009年   2247篇
  2008年   3789篇
  2007年   4156篇
  2006年   4061篇
  2005年   3859篇
  2004年   3567篇
  2003年   3288篇
  2002年   3133篇
  2001年   648篇
  2000年   584篇
  1999年   615篇
  1998年   635篇
  1997年   568篇
  1996年   459篇
  1995年   425篇
  1994年   339篇
  1993年   381篇
  1992年   400篇
  1991年   362篇
  1990年   326篇
  1989年   317篇
  1988年   307篇
  1987年   258篇
  1986年   232篇
  1985年   240篇
  1984年   208篇
  1983年   220篇
  1982年   194篇
  1981年   192篇
  1980年   198篇
  1979年   202篇
  1978年   153篇
  1977年   135篇
  1976年   128篇
  1974年   135篇
  1973年   159篇
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
1.
2.
Introduction: Pharmacovigilance is essential to monitoring the safety profiles of authorized medicines. Compared with small-molecule drugs, biological drugs are more complex, more susceptible to structural variability due to manufacturing processes, and have the potential to induce immune-related reactions, underscoring the importance of safety monitoring for these products. Although highly similar to reference products, biosimilars are not expected to be structurally identical. For these reasons, proper reporting of potential adverse drug reactions (ADRs) using distinguishable names and batch numbers is essential for accurate tracing of all biological drugs. To address the need for robust pharmacovigilance, the European Parliament and Council of the European Union provided legislation regarding pharmacovigilance of biologics in 2010.

Areas covered: This narrative review examines the current state of pharmacovigilance for biologics in the European Union (EU) and discusses relevant information on pharmacovigilance of biosimilars, the current EU pharmacovigilance system, and areas that could be improved.

Expert opinion: Although steps have been taken to improve pharmacovigilance of biologics in the EU, several enhancements can still be made, including additional training for healthcare professionals on ADR reporting, the use of 2D barcodes that enhance traceability, and an open discussion of potentially missed opportunities in the pharmacovigilance of biosimilars.  相似文献   

3.
4.
5.
6.
7.
8.
9.
10.

Objective

Successful weight loss interventions for African-Americans adolescents are lacking. Cognitive-behavioral interventions seek to develop weight loss skills (e.g., counting calories, goal setting, managing one's environment). Little is known about how well adolescents implement such skills in their daily lives. Study aims were to (1) examine weight loss skills utilization at midpoint and end of a 6-month cognitive-behavioral/motivational interviewing weight loss sequential multiple assignment randomized trial (SMART), and (2) determine if greater skill utilization predicted weight loss at treatment end and 3 months post-treatment.

Method

One hundred and eighty six African-Americans adolescents with obesity and their caregiver were first randomly assigned to complete 3 months of cognitive-behavioral and motivational interviewing family-based weight loss treatment in their home or in the research office (Phase 1). Nonresponders (i.e., those who lost < 3% of initial weight, n?=?161) were rerandomized to 3 months of continued skills training (n?=?83) or contingency management (n?=?78) for Phase 2; responders were allocated to 3 months of relapse prevention (n?=?20). Adolescents’ frequency of weight loss skills utilization was assessed via questionnaire at treatment midpoint and end.

Results

Higher treatment attendance was associated with better skill utilization. Higher skill utilization was associated with more weight loss at treatment end, whereas higher baseline confidence was associated with more weight loss at follow-up.

Conclusions

This study indicates the importance of attending weight loss intervention sessions to develop and strengthen weight loss skills in African-American adolescents with obesity, and strengthening confidence to use such skills for continued weight loss.  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