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   56944篇
  免费   6559篇
  国内免费   243篇
耳鼻咽喉   743篇
儿科学   2094篇
妇产科学   1566篇
基础医学   6904篇
口腔科学   1116篇
临床医学   10635篇
内科学   10768篇
皮肤病学   1189篇
神经病学   5480篇
特种医学   1400篇
外科学   5404篇
综合类   767篇
现状与发展   2篇
一般理论   62篇
预防医学   7472篇
眼科学   769篇
药学   2827篇
  3篇
中国医学   154篇
肿瘤学   4391篇
  2024年   103篇
  2023年   808篇
  2022年   609篇
  2021年   1515篇
  2020年   1429篇
  2019年   1564篇
  2018年   2138篇
  2017年   1838篇
  2016年   1983篇
  2015年   2139篇
  2014年   2551篇
  2013年   3700篇
  2012年   4037篇
  2011年   4100篇
  2010年   2588篇
  2009年   2493篇
  2008年   3361篇
  2007年   3386篇
  2006年   3375篇
  2005年   3096篇
  2004年   2965篇
  2003年   2695篇
  2002年   2420篇
  2001年   576篇
  2000年   383篇
  1999年   533篇
  1998年   884篇
  1997年   770篇
  1996年   795篇
  1995年   683篇
  1994年   545篇
  1993年   461篇
  1992年   323篇
  1991年   288篇
  1990年   255篇
  1989年   233篇
  1988年   205篇
  1987年   159篇
  1986年   147篇
  1985年   154篇
  1984年   148篇
  1983年   145篇
  1982年   163篇
  1981年   169篇
  1980年   122篇
  1979年   75篇
  1978年   79篇
  1977年   64篇
  1976年   59篇
  1975年   43篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
21.
22.
23.
24.
25.
Neurocritical Care - For years, the use of ketamine as an anesthetic to patients suffering from acute brain injury has been debated because of its possible deleterious effects on the cerebral...  相似文献   
26.
27.
28.
29.
Since the introduction of cART (combination antiretroviral therapy), HIV has evolved into a chronic disease such that it requires lifelong medical treatment to which patients must adhere. Communication with health care providers is pivotal in supporting patients to adapt to having HIV and adhering to treatment, in order to maintain health and quality of life. Previous research indicates that communication is optimal when it matches patient preferences for information exchange, relationship establishment, and involvement in treatment decisions. The aim of the present study is to explore HIV patient communication preferences as well as patient experiences with their providers (not) matching their preferences. A second aim is to explore provider beliefs about patient preferences and provider views on optimal communication. Data were collected through interviews with 28 patients and 11 providers from two academic hospitals. Results indicate that patient preferences reflect their cognitive, emotional, and practical needs such that patients look to increase their sense of control over their HIV. Patients aim to further increase their sense of control (by proxy) through their relationship with their providers and through their decisional involvement preferences. Providers are well aware of patient communication preferences but do not explicate underlying control needs. Implications for clinical practice are discussed.  相似文献   
30.
Marie Warrer Petersen  Tine Sylvest Meyhoff  Marie Helleberg  Maj-Brit Nørregaard Kjær  Anders Granholm  Carl Johan Steensen Hjortsø  Thomas Steen Jensen  Morten Hylander Møller  Peter Buhl Hjortrup  Mik Wetterslev  Gitte Kingo Vesterlund  Lene Russell  Vibeke Lind Jørgensen  Klaus Tjelle  Thomas Benfield  Charlotte Suppli Ulrik  Anne Sofie Andreasen  Thomas Mohr  Morten H. Bestle  Lone Musaeus Poulsen  Mette Friberg Hitz  Thomas Hildebrandt  Lene Surland Knudsen  Anders Møller  Christoffer Grant Sølling  Anne Craveiro Brøchner  Bodil Steen Rasmussen  Henrik Nielsen  Steffen Christensen  Thomas Strøm  Maria Cronhjort  Rebecka Rubenson Wahlin  Stephan Jakob  Luca Cioccari  Balasubramanian Venkatesh  Naomi Hammond  Vivekanand Jha  Sheila Nainan Myatra  Christian Gluud  Theis Lange  Anders Perner 《Acta anaesthesiologica Scandinavica》2020,64(9):1365-1375

Introduction

Severe acute respiratory syndrome coronavirus-2 has caused a pandemic of coronavirus disease (COVID-19) with many patients developing hypoxic respiratory failure. Corticosteroids reduce the time on mechanical ventilation, length of stay in the intensive care unit and potentially also mortality in similar patient populations. However, corticosteroids have undesirable effects, including longer time to viral clearance. Clinical equipoise on the use of corticosteroids for COVID-19 exists.

Methods

The COVID STEROID trial is an international, randomised, stratified, blinded clinical trial. We will allocate 1000 adult patients with COVID-19 receiving ≥10 L/min of oxygen or on mechanical ventilation to intravenous hydrocortisone 200 mg daily vs placebo (0.9% saline) for 7 days. The primary outcome is days alive without life support (ie mechanical ventilation, circulatory support, and renal replacement therapy) at day 28. Secondary outcomes are serious adverse reactions at day 14; days alive without life support at day 90; days alive and out of hospital at day 90; all-cause mortality at day 28, day 90, and 1 year; and health-related quality of life at 1 year. We will conduct the statistical analyses according to this protocol, including interim analyses for every 250 patients followed for 28 days. The primary outcome will be compared using the Kryger Jensen and Lange test in the intention to treat population and reported as differences in means and medians with 95% confidence intervals.

Discussion

The COVID STEROID trial will provide important evidence to guide the use of corticosteroids in COVID-19 and severe hypoxia.
  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