全文获取类型
收费全文 | 158850篇 |
免费 | 10522篇 |
国内免费 | 415篇 |
专业分类
耳鼻咽喉 | 1984篇 |
儿科学 | 4236篇 |
妇产科学 | 2987篇 |
基础医学 | 22840篇 |
口腔科学 | 4310篇 |
临床医学 | 15747篇 |
内科学 | 31730篇 |
皮肤病学 | 3171篇 |
神经病学 | 16846篇 |
特种医学 | 6821篇 |
外国民族医学 | 6篇 |
外科学 | 22597篇 |
综合类 | 1442篇 |
一般理论 | 102篇 |
预防医学 | 11600篇 |
眼科学 | 2864篇 |
药学 | 10730篇 |
中国医学 | 194篇 |
肿瘤学 | 9580篇 |
出版年
2023年 | 857篇 |
2022年 | 1283篇 |
2021年 | 2599篇 |
2020年 | 1859篇 |
2019年 | 2533篇 |
2018年 | 3637篇 |
2017年 | 2827篇 |
2016年 | 3480篇 |
2015年 | 3537篇 |
2014年 | 4504篇 |
2013年 | 6634篇 |
2012年 | 9548篇 |
2011年 | 10017篇 |
2010年 | 5732篇 |
2009年 | 4715篇 |
2008年 | 9289篇 |
2007年 | 9939篇 |
2006年 | 9264篇 |
2005年 | 9123篇 |
2004年 | 8612篇 |
2003年 | 8073篇 |
2002年 | 7968篇 |
2001年 | 4390篇 |
2000年 | 5027篇 |
1999年 | 3374篇 |
1998年 | 1762篇 |
1997年 | 1473篇 |
1996年 | 1158篇 |
1995年 | 1101篇 |
1994年 | 1003篇 |
1993年 | 932篇 |
1992年 | 1427篇 |
1991年 | 1292篇 |
1990年 | 1223篇 |
1989年 | 1241篇 |
1988年 | 1078篇 |
1987年 | 1023篇 |
1986年 | 1052篇 |
1985年 | 1091篇 |
1984年 | 979篇 |
1983年 | 837篇 |
1982年 | 799篇 |
1981年 | 666篇 |
1980年 | 598篇 |
1979年 | 742篇 |
1978年 | 583篇 |
1977年 | 555篇 |
1975年 | 495篇 |
1974年 | 498篇 |
1973年 | 518篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Lorenz Ulrich Anna Michelitsch Nico Halwe Kerstin Wernike Donata Hoffmann Martin Beer 《Emerging infectious diseases》2021,27(4):1193
After experimental inoculation, severe acute respiratory syndrome coronavirus 2 infection was confirmed in bank voles by seroconversion within 8 days and detection of viral RNA in nasal tissue for up to 21 days. However, transmission to contact animals was not detected. Thus, bank voles are unlikely to establish effective transmission cycles in nature. 相似文献
992.
Philip Eisermann Dennis Rubbenstroth Daniel Cadar Corinna Thom-Bolduan Petra Eggert Alexander Schlaphof Frank Leypoldt Martin Stangel Thorsten Fortwngler Florian Hoffmann Andreas Osterman Sabine Zange Hans-Helmut Niller Klemens Angstwurm Kirsten Prtner Christina Frank Hendrik Wilking Martin Beer Jonas Schmidt-Chanasit Dennis Tappe 《Emerging infectious diseases》2021,27(5):1371
Human bornavirus encephalitis is a severe and often fatal infection caused by variegated squirrel bornavirus 1 (VSBV-1) and Borna disease virus 1 (BoDV-1). We conducted a prospective study of bornavirus etiology of encephalitis cases in Germany during 2018–2020 by using a serologic testing scheme applied along proposed graded case definitions for VSBV-1, BoDV-1, and unspecified bornavirus encephalitis. Of 103 encephalitis cases of unknown etiology, 4 bornavirus infections were detected serologically. One chronic case was caused by VSBV-1 after occupational-related contact of a person with exotic squirrels, and 3 acute cases were caused by BoDV-1 in virus-endemic areas. All 4 case-patients died. Bornavirus etiology could be confirmed by molecular methods. Serologic testing for these cases was virus specific, discriminatory, and a practical diagnostic option for living patients if no brain tissue samples are available. This testing should be guided by clinical and epidemiologic suspicions, such as residence in virus-endemic areas and animal exposure. 相似文献
993.
Jrg Hofmann Stephanie Kramer Klaus R. Herrlinger Kathrin Jeske Martin Kuhns Sabrina Weiss Rainer G. Ulrich Detlev H. Krüger 《Emerging infectious diseases》2021,27(4):1232
We report molecular evidence of Tula virus infection in an immunocompetent patient from Germany who had typical signs of hantavirus disease. Accumulating evidence indicates that Tula virus infection, although often considered nonpathogenic, represents a threat to human health. 相似文献
994.
Association of single-nucleotide polymorphisms of the tau gene with late-onset Parkinson disease. 总被引:14,自引:1,他引:13
E R Martin W K Scott M A Nance R L Watts J P Hubble W C Koller K Lyons R Pahwa M B Stern A Colcher B C Hiner J Jankovic W G Ondo F H Allen C G Goetz G W Small D Masterman F Mastaglia N G Laing J M Stajich R C Ribble M W Booze A Rogala M A Hauser F Zhang R A Gibson L T Middleton A D Roses J L Haines B L Scott M A Pericak-Vance J M Vance 《JAMA》2001,286(18):2245-2250
CONTEXT: The human tau gene, which promotes assembly of neuronal microtubules, has been associated with several rare neurologic diseases that clinically include parkinsonian features. We recently observed linkage in idiopathic Parkinson disease (PD) to a region on chromosome 17q21 that contains the tau gene. These factors make tau a good candidate for investigation as a susceptibility gene for idiopathic PD, the most common form of the disease. OBJECTIVE: To investigate whether the tau gene is involved in idiopathic PD. DESIGN, SETTING, AND PARTICIPANTS: Among a sample of 1056 individuals from 235 families selected from 13 clinical centers in the United States and Australia and from a family ascertainment core center, we tested 5 single-nucleotide polymorphisms (SNPs) within the tau gene for association with PD, using family-based tests of association. Both affected (n = 426) and unaffected (n = 579) family members were included; 51 individuals had unclear PD status. Analyses were conducted to test individual SNPs and SNP haplotypes within the tau gene. MAIN OUTCOME MEASURE: Family-based tests of association, calculated using asymptotic distributions. RESULTS: Analysis of association between the SNPs and PD yielded significant evidence of association for 3 of the 5 SNPs tested: SNP 3, P =.03; SNP 9i, P =.04; and SNP 11, P =.04. The 2 other SNPs did not show evidence of significant association (SNP 9ii, P =.11, and SNP 9iii, P =.87). Strong evidence of association was found with haplotype analysis, with a positive association with one haplotype (P =.009) and a negative association with another haplotype (P =.007). Substantial linkage disequilibrium (P<.001) was detected between 4 of the 5 SNPs (SNPs 3, 9i, 9ii, and 11). CONCLUSIONS: This integrated approach of genetic linkage and positional association analyses implicates tau as a susceptibility gene for idiopathic PD. 相似文献
995.
Unsafe injection practices in a cohort of injection drug users in Vancouver: Could safer injecting rooms help? 总被引:10,自引:6,他引:4 下载免费PDF全文
996.
BIOETHICS IS NOW TAUGHT IN EVERY CANADIAN MEDICAL SCHOOL. Canada needs a cadre of teachers who can help clinicians learn bioethics. Our purpose is to encourage clinician teachers to accept this important responsibility and to provide practical advice about teaching bioethics to clinicians as an integral part of good clinical medicine. We use 5 questions to focus the discussion: Why should I teach? What should I teach? How should I teach? How should I evaluate? How should I learn? 相似文献
997.
Alfred K. Cheung Tara I. Chang William C. Cushman Susan L. Furth Fan Fan Hou Joachim H. Ix Gregory A. Knoll Paul Muntner Roberto Pecoits-Filho Mark J. Sarnak Sheldon W. Tobe Charles R.V. Tomson Lyubov Lytvyn Jonathan C. Craig David J. Tunnicliffe Martin Howell Marcello Tonelli Michael Cheung Johannes F.E. Mann 《Kidney international》2021,99(3):559-569
998.
999.
1000.
Lasers in Medical Science - Unlike other rosacea therapies which need daily takings or applications over long periods, the edge of lasers and light-based therapies (LLBT) is the limited number of... 相似文献