全文获取类型
收费全文 | 530000篇 |
免费 | 27637篇 |
国内免费 | 495篇 |
专业分类
耳鼻咽喉 | 6681篇 |
儿科学 | 16921篇 |
妇产科学 | 12537篇 |
基础医学 | 92614篇 |
口腔科学 | 12347篇 |
临床医学 | 48495篇 |
内科学 | 95430篇 |
皮肤病学 | 11868篇 |
神经病学 | 34007篇 |
特种医学 | 19755篇 |
外国民族医学 | 53篇 |
外科学 | 78062篇 |
综合类 | 7610篇 |
现状与发展 | 2篇 |
一般理论 | 107篇 |
预防医学 | 38535篇 |
眼科学 | 11939篇 |
药学 | 41406篇 |
1篇 | |
中国医学 | 1126篇 |
肿瘤学 | 28636篇 |
出版年
2021年 | 3892篇 |
2018年 | 5731篇 |
2017年 | 4126篇 |
2016年 | 4869篇 |
2015年 | 5360篇 |
2014年 | 7116篇 |
2013年 | 10499篇 |
2012年 | 15573篇 |
2011年 | 17391篇 |
2010年 | 9956篇 |
2009年 | 8821篇 |
2008年 | 15710篇 |
2007年 | 17444篇 |
2006年 | 16939篇 |
2005年 | 16260篇 |
2004年 | 15880篇 |
2003年 | 15261篇 |
2002年 | 14782篇 |
2001年 | 22428篇 |
2000年 | 22970篇 |
1999年 | 18919篇 |
1998年 | 5232篇 |
1997年 | 4364篇 |
1996年 | 4397篇 |
1995年 | 4124篇 |
1992年 | 14413篇 |
1991年 | 15817篇 |
1990年 | 15949篇 |
1989年 | 15625篇 |
1988年 | 14308篇 |
1987年 | 14198篇 |
1986年 | 13168篇 |
1985年 | 12686篇 |
1984年 | 9394篇 |
1983年 | 8000篇 |
1982年 | 4177篇 |
1979年 | 8937篇 |
1978年 | 6382篇 |
1977年 | 5149篇 |
1976年 | 5504篇 |
1975年 | 6613篇 |
1974年 | 7419篇 |
1973年 | 7158篇 |
1972年 | 6597篇 |
1971年 | 6309篇 |
1970年 | 5887篇 |
1969年 | 5467篇 |
1968年 | 5161篇 |
1967年 | 4621篇 |
1966年 | 3963篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
Expression of p27 and p53: comparative analysis of uterine carcinosarcoma and endometrial carcinoma 总被引:1,自引:0,他引:1
A. Abargel I. Avinoach† V. Kravtsov† M. Boaz‡ M. Glezerman‡ & J. Menczer‡ 《International journal of gynecological cancer》2004,14(2):354-359
The aim of the study was to assess both p27 and p53 expression in the stromal and epithelial component of carcinosarcoma and to assess if their expression in the latter is different than in endometrial carcinoma. Immunohistochemical staining for p27 and p53 was performed on paraffin-embedded tissue blocks of 18 uterine specimens with carcinosarcoma and their expression assessed. Their expression in the epithelial element was also compared to that in 35 paraffin-embedded tissue blocks of endometrial endometrioid carcinoma. Reduced p27 expression was observed in a similarly high proportion of the stromal (77.8%) as well as of the epithelial component (66.7%) of carcinosarcoma. Although statistically not significant, the proportion of reduced p27 expression in endometrial carcinoma (85.7%) was higher than in the epithelial element of carcinosarcoma. The percentage of p53 overexpression in both elements of carcinosarcomas and in endometrial carcinomas was low and also similar (27.8 and 20.0%, respectively). Our results indicate that reduced p27 expression is common and p53 overexpression is infrequent in carcinosarcoma. Their similar rates of expression in the stromal and epithelial elements of the tumor support the contention of a monoclonal origin of carcinosarcoma. Unexpectedly, reduced p27 expression is more common in endometrial carcinoma than in the epithelial element of carcinosarcoma, in spite of the less favorable prognosticators and outcome in the latter. Further studies of p27 expression in carcinosarcoma are indicated to establish its clinical value in this aggressive malignancy. 相似文献
995.
996.
Fawzi S. AlKhawari Gerry V. Stimson Anthony N. Warrens 《American journal of transplantation》2005,5(6):1326-1331
The worldwide shortage of organs for transplantation makes it important to understand why some oppose donation. Attitudes vary with religion and ethnicity. Accordingly, we undertook a qualitative study of the attitudes of 141 U.K. Muslim Indo-Asians to organ donation. Participants were observed, focus group discussions held and in-depth individual interviews conducted. We identified a high level of alienation from the health care system in general. With respect to organ donation in particular, its importance was generally discounted, often in deference to authority figures within the community who appeared negatively disposed. The culture-specific issues arguing against donation included a sense of the sacredness of the body, a fatalistic approach to illness, a belief that organs took on an independent role as 'witnesses' to an individual's life on Judgement Day and an anxiety that the donor would have no control of the probity of the recipient of an organ. We believe these data suggest a need to improve in a culturally sensitive fashion the provision of health information provided to this community. 相似文献
997.
998.
999.
1000.
We report the case of a 49-year-old patient, with recent onset of fatigue, who was diagnosed with atrial fibrillation, which was cardioverted electrically. A diagnosis of right atrial aneurysm, with no other cardiac pathology, was made. An aneurysmectomy was performed. Both surgery and postoperative recovery were uneventful. 相似文献