全文获取类型
收费全文 | 6637篇 |
免费 | 380篇 |
国内免费 | 26篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 98篇 |
妇产科学 | 106篇 |
基础医学 | 853篇 |
口腔科学 | 150篇 |
临床医学 | 554篇 |
内科学 | 2059篇 |
皮肤病学 | 125篇 |
神经病学 | 573篇 |
特种医学 | 160篇 |
外科学 | 940篇 |
综合类 | 63篇 |
一般理论 | 1篇 |
预防医学 | 468篇 |
眼科学 | 167篇 |
药学 | 389篇 |
中国医学 | 10篇 |
肿瘤学 | 277篇 |
出版年
2023年 | 39篇 |
2022年 | 94篇 |
2021年 | 235篇 |
2020年 | 106篇 |
2019年 | 163篇 |
2018年 | 234篇 |
2017年 | 118篇 |
2016年 | 193篇 |
2015年 | 178篇 |
2014年 | 272篇 |
2013年 | 316篇 |
2012年 | 516篇 |
2011年 | 535篇 |
2010年 | 327篇 |
2009年 | 281篇 |
2008年 | 427篇 |
2007年 | 489篇 |
2006年 | 460篇 |
2005年 | 387篇 |
2004年 | 390篇 |
2003年 | 316篇 |
2002年 | 309篇 |
2001年 | 40篇 |
2000年 | 36篇 |
1999年 | 39篇 |
1998年 | 60篇 |
1997年 | 46篇 |
1996年 | 35篇 |
1995年 | 32篇 |
1994年 | 28篇 |
1993年 | 40篇 |
1992年 | 32篇 |
1991年 | 21篇 |
1990年 | 13篇 |
1989年 | 11篇 |
1988年 | 17篇 |
1987年 | 9篇 |
1986年 | 8篇 |
1984年 | 19篇 |
1983年 | 20篇 |
1982年 | 19篇 |
1981年 | 21篇 |
1980年 | 13篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 16篇 |
1976年 | 9篇 |
1974年 | 11篇 |
1970年 | 5篇 |
1969年 | 6篇 |
排序方式: 共有7043条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
María Lilia Díaz Betancourt Julio César Klínger Hernández Victoria Eugenia Ni?o Casta?o 《Colombia Médica》2012,43(4):305-311
Lymphocytopenia and CD4+ T lymphocytopenia can be associated with many bacterial, fungal, parasite and viral infections. They can also be found in autoimmune and neoplastic diseases, common variable immunodeficiency syndrome, physical, psychological and traumatic stress, malnutrition and immunosuppressive therapy. Besides, they can also be brought into relation, without a known cause, with idiopathic CD4+ T lymphocytopenia. Among viral infections, the Retrovirus, specially the human immunodeficiency virus, is the most frequently cause. However, many acute viral infections, including cytomegalovirus and Epstein Barr virus can be associated with transient lymphocytopenia and CD4+ T lymphocytopenia. As is well known, transient lymphocytopenia and CD4+ T lymphocytopenia are temporary and overcome when the disease improves. Nonetheless, severe CD4+ T Lymphocytopenia associated with chronic infections by human herpes virus has not been reported. We describe 6 cases of human immunodeficiency virus negative patients, with chronic cytomegalovirus and Epstein Barr virus infections and profound lymphocytopenia with clinical symptoms of cellular immunodeficiency. These patients improved rapidly with ganciclovir or valganciclovir treatment. We claim here that it is important to consider the chronic human herpes virus infection in the differential diagnosis of profoundly CD4+ T lymphocytopenia etiology, when human immunodeficiency virus is absent, in order to start effective treatment and to determine, in future studies, the impact of chronic human herpes virus infection in human beings'' health. 相似文献
95.
Aniel J. L. Brambila-Tapia Jorge I. G��mez-Nava Laura Gonz��lez-L��pez Lucila Sandoval-Ram��rez Julio Med��na-D��az Montserrat Maldonado Sergio R. Gutierrez-Ure?a Gloria Mart��nez-Bonilla Beatriz T. Mart��n-M��rquez M��nica V��zquez del Mercado Arnulfo Nava-Zavala Jos�� F. Mu?oz-Valle Mario Salazar-P��ramo Ingrid P. D��valos-Rodr��guez 《Rheumatology international》2011,31(8):1065-1068
The objective of this study is to establish whether there is an association between the presence of FCGR3A V(176) polymorphism with SLE or its manifestations. We included 94 patients according to the 1982 ACR criteria as well as 98 controls matched by age and gender. The 11 ACR diagnostic criteria were analyzed on the clinical files. The polymorphism FCGR3A V(176) was determined by direct sequencing. There was not an association between the polymorphism FCGR3A V(176) with SLE or its main manifestations. The allelic frequency for F(176) was: 0.80 and 0.72 in cases and controls, respectively (P?=?0.09, IC95%: 0.42?C1.07); and the genotypic frequency in the group of cases was: 0.65 for homozygotes F(176)/F(176), 0.30 for heterozygotes and 0.05 for the homozygotes V(176)/V(176), while for the control group it was 0.53, 0.39 and 0.08, respectively. The polymorphism FCGR3A V(176) is not associated with SLE or any of its manifestations in patients with SLE from the West of Mexico. 相似文献
96.
97.
Vladimir Carli Peter Parzer Camilla Wasserman Birgitta Floderus Alan Apter Judit Balazs Shira Barzilay Julio Bobes Romuald Brunner Paul Corcoran Doina Cosman Padraig Cotter Romain Despalins Nadja Graber Francis Guillemin Christian Haring Jean‐Pierre Kahn Laura Mandelli Dragan Marusic Gergely Mészáros George J. Musa Vita Postuvan Franz Resch Pilar A. Saiz Merike Sisask Airi Varnik Marco Sarchiapone Christina W. Hoven Danuta Wasserman 《Addiction (Abingdon, England)》2012,107(12):2210-2222
98.
99.
100.
Julio E. González-Aguirre Claudia Paola Rivera-Uribe Erick Joel Rendón-Ramírez Rogelio Cañamar-Lomas Juan Antonio Serna-Rodríguez Roberto Mercado-Longoría 《Archivos de bronconeumologia》2019,55(4):195-200