全文获取类型
收费全文 | 1717篇 |
免费 | 91篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 50篇 |
妇产科学 | 18篇 |
基础医学 | 213篇 |
口腔科学 | 47篇 |
临床医学 | 170篇 |
内科学 | 392篇 |
皮肤病学 | 67篇 |
神经病学 | 58篇 |
特种医学 | 199篇 |
外国民族医学 | 1篇 |
外科学 | 244篇 |
综合类 | 46篇 |
一般理论 | 1篇 |
预防医学 | 124篇 |
眼科学 | 9篇 |
药学 | 103篇 |
中国医学 | 3篇 |
肿瘤学 | 65篇 |
出版年
2021年 | 13篇 |
2020年 | 10篇 |
2019年 | 14篇 |
2018年 | 23篇 |
2017年 | 15篇 |
2016年 | 26篇 |
2015年 | 36篇 |
2014年 | 25篇 |
2013年 | 47篇 |
2012年 | 68篇 |
2011年 | 65篇 |
2010年 | 50篇 |
2009年 | 64篇 |
2008年 | 56篇 |
2007年 | 61篇 |
2006年 | 59篇 |
2005年 | 52篇 |
2004年 | 81篇 |
2003年 | 43篇 |
2002年 | 54篇 |
2001年 | 36篇 |
2000年 | 40篇 |
1999年 | 60篇 |
1998年 | 67篇 |
1997年 | 67篇 |
1996年 | 68篇 |
1995年 | 53篇 |
1994年 | 50篇 |
1993年 | 44篇 |
1992年 | 27篇 |
1991年 | 37篇 |
1990年 | 39篇 |
1989年 | 39篇 |
1988年 | 40篇 |
1987年 | 38篇 |
1986年 | 33篇 |
1985年 | 21篇 |
1984年 | 11篇 |
1983年 | 15篇 |
1982年 | 19篇 |
1981年 | 9篇 |
1980年 | 14篇 |
1979年 | 12篇 |
1978年 | 13篇 |
1977年 | 14篇 |
1976年 | 9篇 |
1975年 | 9篇 |
1974年 | 9篇 |
1973年 | 9篇 |
1972年 | 7篇 |
排序方式: 共有1820条查询结果,搜索用时 31 毫秒
1.
R. H. Wiesner B. J. Steffen K. M. David A. H. Chu R. D. Gordon J. R. Lake 《American journal of transplantation》2006,6(7):1609-1616
Mycophenolate mofetil (MMF) used in a triple-drug regimen has been shown to decrease acute rejection rates, compared to a double-drug regimen. The impact of MMF on late acute rejection (LAR) episodes has not been well described. To investigate the risk of LAR (rejection > or = 6 months post-transplantation) data from the Scientific Registry of Transplant Recipients (SRTR) were used. We studied adult primary liver transplant recipients transplanted between June 1, 1995, and April 30, 2004, with hepatitis C virus (HCV) (n = 3356), hepatitis B virus (HBV) (n = 550) or a nonviral (n = 5740) primary cause of liver disease who were recorded as receiving continuous 3-(MMF + Tacro + steroids) versus 2-drug (Tacro + steroids) therapy for at least 6 months immediately post transplantation. Kaplan-Meier analysis showed significantly lower LAR rates 4 years post-transplant in 3- versus 2-drug HCV, HBV and nonviral disease patients. Multivariate regression confirmed 3- versus 2-drug therapy to be associated with a decreased risk of LAR. Late graft survival was significantly lower at 4 years post-transplant for patients with LAR 6-12 months post-transplantation versus patients with early rejection (78.0% vs. 87.0%, p < 0.001) and no rejection (88.1%, p < 0.001). Three-drug versus 2-drug therapy for a minimum of 6 months may offer a better treatment strategy to avoid the consequences and expense of LAR episodes. 相似文献
2.
3.
4.
5.
Ketai LH; Williamson MR; Telepak RJ; Levy H; Koster FT; Nolte KB; Allen SE 《Radiology》1994,191(3):665
6.
7.
8.
9.
10.
C V Paya R H Wiesner P E Hermans J J Larson-Keller D M Ilstrup R A Krom S B Moore J Ludwig T F Smith 《Hepatology (Baltimore, Md.)》1992,16(1):66-70
In this study we evaluated the association between cytomegalovirus infection alone or in relation to human leukocyte antigen matching and the development of vanishing bile duct syndrome, a form of chronic hepatic allograft rejection. A total of 81 consecutive liver transplant recipients were studied. Cytomegalovirus infection developed in 46 recipients (57%), and vanishing bile duct syndrome occurred in 9 recipients (11%). Cytomegalovirus infection developed in only five of the nine patients with vanishing bile duct syndrome. Univariate analysis of pretransplant recipient/donor cytomegalovirus serological tests and human leukocyte antigen typing showed they were not significant risk factors for the development of vanishing bile duct syndrome. Time-dependent analysis of cytomegalovirus infection after transplantation as a risk factor for vanishing bile duct syndrome, in a multivariate analysis with human leukocyte antigen match, showed no statistical significance. In our study, no association was found between cytomegalovirus infection alone or in relation to class I or II human leukocyte antigen match and the subsequent development of vanishing bile duct syndrome. 相似文献