全文获取类型
收费全文 | 3858篇 |
免费 | 314篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 38篇 |
儿科学 | 66篇 |
妇产科学 | 42篇 |
基础医学 | 543篇 |
口腔科学 | 120篇 |
临床医学 | 347篇 |
内科学 | 781篇 |
皮肤病学 | 104篇 |
神经病学 | 298篇 |
特种医学 | 102篇 |
外科学 | 561篇 |
综合类 | 225篇 |
一般理论 | 5篇 |
预防医学 | 229篇 |
眼科学 | 174篇 |
药学 | 195篇 |
中国医学 | 6篇 |
肿瘤学 | 355篇 |
出版年
2023年 | 37篇 |
2022年 | 63篇 |
2021年 | 197篇 |
2020年 | 112篇 |
2019年 | 111篇 |
2018年 | 141篇 |
2017年 | 100篇 |
2016年 | 114篇 |
2015年 | 153篇 |
2014年 | 175篇 |
2013年 | 212篇 |
2012年 | 288篇 |
2011年 | 290篇 |
2010年 | 135篇 |
2009年 | 147篇 |
2008年 | 196篇 |
2007年 | 191篇 |
2006年 | 184篇 |
2005年 | 187篇 |
2004年 | 162篇 |
2003年 | 126篇 |
2002年 | 120篇 |
2001年 | 86篇 |
2000年 | 100篇 |
1999年 | 86篇 |
1998年 | 38篇 |
1997年 | 28篇 |
1996年 | 27篇 |
1995年 | 19篇 |
1994年 | 9篇 |
1993年 | 6篇 |
1992年 | 32篇 |
1991年 | 40篇 |
1990年 | 32篇 |
1989年 | 39篇 |
1988年 | 24篇 |
1987年 | 27篇 |
1986年 | 28篇 |
1985年 | 23篇 |
1984年 | 21篇 |
1983年 | 11篇 |
1982年 | 8篇 |
1981年 | 8篇 |
1980年 | 4篇 |
1979年 | 13篇 |
1978年 | 5篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1974年 | 4篇 |
1973年 | 4篇 |
排序方式: 共有4191条查询结果,搜索用时 0 毫秒
1.
Williamson Kathleen A.; Hever Ann M.; Rainger Joe; Rogers R. Curtis; Magee Alex; Fiedler Zdenek; Keng Wee Teik; Sharkey Freddie H.; McGill Niolette; Hill Clare J.; Schneider Adele; Messina Mario; Turnpenny Peter D.; Fantes Judy A.; van Heyningen Veronica; FitzPatrick David R. 《Human molecular genetics》2006,15(12):2030
Table 1 相似文献
2.
3.
Michael Altmann Beeling C. Wee Keith Willard Denton Peterson Laël C. Gatewood 《Statistics in medicine》1994,13(1):53-60
The authors measure the efficacy of three methods for predicting the time to infection for susceptible individuals in a population undergoing an HIV epidemic. The methods differ in whether they require detailed information of the contact network and whether they require knowledge of the initial source of infection. Efficacy is evaluated using simulations for 20 different contact patterns. Only the risk score that uses both kinds of information accounts for more than 15 per cent of individual variability. The efficacy of this score ranges from 10 per cent in very unstructured populations to 60 per cent for spatially localized contact networks. This improved performance may be explained by the larger fraction of the total variability not due to the disease dynamics. When all variables are dichotomized, the two poorer methods produce odds ratios between 1.4 and 2.3. The odds ratio for the risk score with full information ranges from 2.5 to 17. Risk assessment protocols and intervention programmes are encouraged to assess contact patterns and detect sources of infection. 相似文献
4.
CG Teo 《Oral diseases》2002,8(S2):88-90
Oral hairy leukoplakia (OHL) and Kaposi's sarcoma (KS) are commonly encountered in the HIV-infected patient. A unique feature of OHL is non-cytolytic high level of replication of Epstein–Barr virus (EBV) in the glossal epithelium. The expression of viral-encoded anti-apoptotic proteins concomitant to replicative proteins probably underlies this phenomenon. The question of whether OHL arises from activation of EBV latent in the tongue, or from superinfection by endogenous EBV shed via non-glossal sites or by exogenous EBV remains unresolved. Human herpesvirus 8 (HHV8) is now seen as necessary but not sufficient cause of KS. Expression of HHV8-encoded oncogenic proteins in endothelial cells probably explains the aberrant proliferation of these cells in KS lesions. Studies into why KS is so commonly observed at the palate in HIV-infected patients may provide important clues to its pathogenesis. 相似文献
5.
A sciatic nerve lesion is uncommon. We report the utility of the endoscope in an 18-year-old female with multiple lesions of her sciatic nerve. Somatosensory evoked potentials and MRI were indicative of a sciatic nerve lesion. We describe a simple technique of endoscopic exploration of the sciatic nerve to assist intraoperative decision making. 相似文献
6.
7.
M J O Taylor L Y Wee M L Denbow N M Fisk 《Ultrasound in obstetrics & gynecology》2004,24(4):479; author reply 479-479; author reply 481
8.
Despite empirical evidence that cardiac rehabilitation programs can play a significant role in enhancing recovery following a primary cardiac event and in enacting secondary prevention measures, attendance rates remain remarkably low. Referral and attendance at cardiac rehabilitation programs are not one and the same. Recognizing this, issues related to the referral of eligible patients to cardiac rehabilitation and factors that affect patients' decisions regarding attendance must be identified and addressed. This article presents an overview of the potential benefits of cardiac rehabilitation programs, describes salient issues related to referral and attendance, and identifies directions for future research. 相似文献
9.
10.
A J Buckton R Kulasegaram S L Ngui M Fisher R James S Rangarajan C G Teo 《Journal of clinical virology》2007,40(1):60-63
An HIV-1/hepatitis C virus (HCV) co-infected patient with haemophilia received a 48-week course of pegylated interferon-alpha-2b and ribavirin therapy for genotype 5a HCV infection. Virological response was achieved at week 24. At the end of treatment, HCV RNA in serum was detected and identified to belong to genotype 2b, rather than genotype 5a. A sensitive method for identifying minority HCV genotypes in pre-treatment serum showed genotype 2b HCV carriage prior to treatment. Sequencing the interferon sensitivity-determining region of the HCV NS5A gene obtained from pre-, intra- and post-treatment sera revealed emergence of quasispecies bearing R-->K and M-->A/T mutations at codons 2222 and 2223, respectively. Occult presence of minority HCV subpopulations and their acquisition of mutations following therapy can result in poor treatment outcome. 相似文献