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   26120篇
  免费   6114篇
  国内免费   133篇
耳鼻咽喉   711篇
儿科学   956篇
妇产科学   758篇
基础医学   998篇
口腔科学   2724篇
临床医学   4461篇
内科学   5939篇
皮肤病学   554篇
神经病学   2144篇
特种医学   1070篇
外科学   4458篇
综合类   232篇
现状与发展   12篇
一般理论   4篇
预防医学   3082篇
眼科学   469篇
药学   809篇
中国医学   38篇
肿瘤学   2948篇
  2024年   167篇
  2023年   1127篇
  2022年   494篇
  2021年   840篇
  2020年   1321篇
  2019年   618篇
  2018年   1474篇
  2017年   1381篇
  2016年   1644篇
  2015年   1734篇
  2014年   2179篇
  2013年   2592篇
  2012年   1145篇
  2011年   1102篇
  2010年   1559篇
  2009年   2098篇
  2008年   1039篇
  2007年   751篇
  2006年   908篇
  2005年   656篇
  2004年   520篇
  2003年   455篇
  2002年   374篇
  2001年   484篇
  2000年   379篇
  1999年   474篇
  1998年   543篇
  1997年   511篇
  1996年   552篇
  1995年   406篇
  1994年   318篇
  1993年   290篇
  1992年   231篇
  1991年   189篇
  1990年   169篇
  1989年   200篇
  1988年   167篇
  1987年   143篇
  1986年   128篇
  1985年   121篇
  1984年   99篇
  1983年   127篇
  1982年   93篇
  1981年   80篇
  1980年   63篇
  1979年   55篇
  1978年   45篇
  1977年   54篇
  1976年   39篇
  1975年   38篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed.  相似文献   
5.
6.

Purpose

A hydrogel rectal spacer (HRS) is a medical device that is approved by the U.S. Food and Drug Administration to increase the separation between the prostate and rectum. We conducted a cost-effectiveness analysis of HRS use for reduction in radiation therapy (RT) toxicities in patients with prostate cancer (PC) undergoing external beam RT (EBRT).

Methods and Materials

A multistate Markov model was constructed from the U.S. payer perspective to examine the cost-effectiveness of HRS in men with localized PC receiving EBRT (EBRT alone vs EBRT + HRS). The subgroups analyzed included site of HRS placement (hospital outpatient, physician office, ambulatory surgery center) and proportion of patients with good baseline erectile function (EF). Data on EF, gastrointestinal and genitourinary toxicities incidence, and potential risks associated with HRS implantation were obtained from a recently published randomized clinical trial. Health utilities and costs were derived from the literature and the 2018 Physician Fee Schedule and were discounted 3% annually. Quality-adjusted life years (QALYs) and costs were modeled for a 5-year period from receipt of RT. Probabilistic sensitivity analysis and value-based threshold analyses were conducted.

Results

The per-patient 5-year incremental cost for spacers administered in a hospital outpatient setting was $3578, and the incremental effectiveness was 0.0371 QALYs. The incremental cost-effectiveness ratio was $96,440/QALY for patients with PC undergoing HRS insertion in a hospital and $39,286/QALY for patients undergoing HRS insertion in an ambulatory facility. For men with good baseline EF, the incremental cost-effectiveness ratio was $35,548/QALY and $9627/QALY in hospital outpatient and ambulatory facility settings, respectively.

Conclusions

Based on the current Medicare Physician Fee Schedule, HRS is cost-effective at a willingness to pay threshold of $100,000. These results contain substantial uncertainty, suggesting more evidence is needed to refine future decision-making.  相似文献   
7.
8.
9.
10.
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