全文获取类型
收费全文 | 11338篇 |
免费 | 1130篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 86篇 |
儿科学 | 302篇 |
妇产科学 | 284篇 |
基础医学 | 1911篇 |
口腔科学 | 210篇 |
临床医学 | 1297篇 |
内科学 | 2225篇 |
皮肤病学 | 223篇 |
神经病学 | 1098篇 |
特种医学 | 356篇 |
外科学 | 1398篇 |
综合类 | 228篇 |
一般理论 | 11篇 |
预防医学 | 1202篇 |
眼科学 | 187篇 |
药学 | 774篇 |
中国医学 | 21篇 |
肿瘤学 | 674篇 |
出版年
2023年 | 84篇 |
2022年 | 101篇 |
2021年 | 223篇 |
2020年 | 127篇 |
2019年 | 228篇 |
2018年 | 289篇 |
2017年 | 199篇 |
2016年 | 194篇 |
2015年 | 253篇 |
2014年 | 355篇 |
2013年 | 480篇 |
2012年 | 662篇 |
2011年 | 671篇 |
2010年 | 379篇 |
2009年 | 361篇 |
2008年 | 565篇 |
2007年 | 571篇 |
2006年 | 570篇 |
2005年 | 540篇 |
2004年 | 480篇 |
2003年 | 469篇 |
2002年 | 479篇 |
2001年 | 319篇 |
2000年 | 303篇 |
1999年 | 282篇 |
1998年 | 143篇 |
1997年 | 93篇 |
1996年 | 88篇 |
1995年 | 88篇 |
1994年 | 91篇 |
1993年 | 89篇 |
1992年 | 192篇 |
1991年 | 199篇 |
1990年 | 188篇 |
1989年 | 182篇 |
1988年 | 158篇 |
1987年 | 171篇 |
1986年 | 162篇 |
1985年 | 167篇 |
1984年 | 127篇 |
1983年 | 93篇 |
1982年 | 55篇 |
1980年 | 56篇 |
1979年 | 76篇 |
1978年 | 62篇 |
1977年 | 62篇 |
1975年 | 66篇 |
1974年 | 62篇 |
1973年 | 64篇 |
1972年 | 58篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献
2.
3.
4.
5.
Martina A. Steurer Jean Costello Rebecca J. Baer Scott P. Oltman Sky K. Feuer Tania Pacheco-Werner Elizabeth Rogers Marta M. Jankowska Jessica Block Molly McCarthy Matthew S. Pantell Christina Chambers Kelli K. Ryckman Laura L. Jelliffe-Pawlowski 《Paediatric and perinatal epidemiology》2020,34(2):130-138
6.
Hugo Maia Julio Casoy Tania Correia Luís Freitas Kleber Pimentel Célia Athayde Elsimar Coutinho 《Gynecological endocrinology》2006,22(10):547-551
OBJECTIVES: To determine whether aromatase expression in the eutopic endometrium and adenomyotic foci is affected by previous use of oral contraceptives containing gestodene, and to determine whether changes in cyclooxygenase-2 (COX-2) expression occur in adenomyosis during the menstrual cycle. PATIENT AND METHODS: This was a retrospective cohort study carried out in paraffin-embedded endometrial tissue obtained from patients with a histological diagnosis of adenomyosis obtained during the proliferative (n = 25) and luteal (n = 10) phases of the menstrual cycle and following the use of continuous oral contraception with gestodene/ethinyl estradiol (n = 7). COX-2 and aromatase expression were measured in both eutopic endometrium and adenomyotic foci using immunohistochemical methods. RESULTS: Aromatase expression was detected in 80% of the endometrial slices by immunohistochemistry. In positive cases, aromatase was mainly detected in the stromal cells of the eutopic endometrium, whereas in the adenomyotic foci this expression was negative in the majority of the cases. Oral contraceptives containing gestodene, on the other hand, were effective in suppressing aromatase expression in both eutopic and ectopic endometrium. COX-2 expression was detected by immunohistochemistry in the glandular epithelium of both eutopic endometrium and adenomyotic foci and there were no significant changes in its intensity throughout the menstrual cycle. CONCLUSION: Aromatase expression in the eutopic endometrium and adenomyotic foci is suppressed by oral contraceptives containing gestodene. Increased aromatase activity may be responsible for the persistent COX-2 expression during the luteal phase. 相似文献
7.
8.
P Tugwell L Hart G Kraag A Park C Dok F Bianchi C Goldsmith W W Buchanan 《The Journal of rheumatology》1984,11(4):457-461
A crossover double-blind controlled trial was performed on 36 patients with rheumatoid arthritis to assess the necessity for serum salicylate monitoring in determining optimal dosage. There was no clinically or statistically significant increase in the clinical improvement of patients associated with serum monitoring but potentially toxic serum levels occurred without tinnitus when serum monitoring was not used. 相似文献
9.
The well-publicised dangers of contracting infection from blood-borne viruses make an awareness of comprehensive protective measures for self and others an imperative for nurses. Sarah Hart reviews the precautions nurses should take when dealing with contaminated blood and other body fluids, and lays emphasis on the need for all nurses, regardless of the particular area in which they work, to adopt and promote safe practices. 相似文献
10.