全文获取类型
收费全文 | 512415篇 |
免费 | 33980篇 |
国内免费 | 608篇 |
专业分类
耳鼻咽喉 | 6897篇 |
儿科学 | 16870篇 |
妇产科学 | 13523篇 |
基础医学 | 84934篇 |
口腔科学 | 14457篇 |
临床医学 | 44189篇 |
内科学 | 93192篇 |
皮肤病学 | 12145篇 |
神经病学 | 36137篇 |
特种医学 | 18469篇 |
外国民族医学 | 63篇 |
外科学 | 76991篇 |
综合类 | 8455篇 |
一般理论 | 118篇 |
预防医学 | 38880篇 |
眼科学 | 12113篇 |
药学 | 40500篇 |
中国医学 | 1007篇 |
肿瘤学 | 28063篇 |
出版年
2018年 | 4930篇 |
2015年 | 4517篇 |
2014年 | 6075篇 |
2013年 | 9564篇 |
2012年 | 12888篇 |
2011年 | 14287篇 |
2010年 | 8307篇 |
2009年 | 7778篇 |
2008年 | 13701篇 |
2007年 | 14712篇 |
2006年 | 14948篇 |
2005年 | 14367篇 |
2004年 | 14054篇 |
2003年 | 13397篇 |
2002年 | 13277篇 |
2001年 | 24072篇 |
2000年 | 25086篇 |
1999年 | 20562篇 |
1998年 | 5429篇 |
1997年 | 4706篇 |
1996年 | 5044篇 |
1995年 | 4627篇 |
1994年 | 4318篇 |
1993年 | 4137篇 |
1992年 | 15726篇 |
1991年 | 16310篇 |
1990年 | 16418篇 |
1989年 | 15790篇 |
1988年 | 14568篇 |
1987年 | 14413篇 |
1986年 | 13588篇 |
1985年 | 12978篇 |
1984年 | 9612篇 |
1983年 | 8236篇 |
1982年 | 4543篇 |
1981年 | 4215篇 |
1979年 | 9406篇 |
1978年 | 6838篇 |
1977年 | 5755篇 |
1976年 | 5588篇 |
1975年 | 6379篇 |
1974年 | 7632篇 |
1973年 | 7128篇 |
1972年 | 6954篇 |
1971年 | 6680篇 |
1970年 | 6167篇 |
1969年 | 5888篇 |
1968年 | 5557篇 |
1967年 | 5010篇 |
1966年 | 4449篇 |
排序方式: 共有10000条查询结果,搜索用时 359 毫秒
81.
Peffault de Latour Rgis Huynh Lynn Ivanova Jasmina I. Totev Todor Bilginsoy Mehmet Antin Joseph Roy Anuja Duh Mei Sheng 《Annals of hematology》2020,99(4):743-752
Annals of Hematology - This study assessed treatment patterns and healthcare resource utilization (HRU) of patients with severe aplastic anemia (SAA) with insufficient response to immunosuppressive... 相似文献
82.
83.
C. Jacquet F. Goehringer E. Baux J.A. Conrad M.O. Ganne Devonec J.L. Schmutz G. Mathey H. Tronel T. Moulinet I. Chary-Valckenaere T. May C. Rabaud 《Médecine et maladies infectieuses》2019,49(2):112-120
Objective
The teaching hospital of Nancy, France, implemented a specific multidisciplinary care pathway (French acronym AMDPL) to improve the management of patients presenting with Lyme borreliosis (LB) suspicion. We aimed to assess the first year of activity of this care pathway.Patients and methods
We included all patients managed in the AMDPL pathway from November 1, 2016 to October 31, 2017. The first step was a dedicated Lyme disease consultation with an infectious disease specialist. Following this consultation, the LB diagnosis was either confirmed and adequate treatment was prescribed, or a differential diagnosis was established and patients received adequate management, or further investigations were required and patients were offered multidisciplinary management as part of a day hospitalization.Results
A total of 468 patients were included. LB diagnosis was confirmed in 15% of patients (69/468), 49% of patients received a differential diagnosis, and 26% (122/468) of patients had the LB diagnosis ruled out without receiving any other diagnosis.Conclusions
This is to our knowledge the first multidisciplinary center implemented in France for the management of patients presenting with LB suspicion related to polymorphous signs and symptoms. Several diagnoses could be confirmed or corrected, although some symptoms and complaints could not be explained. This cohort could improve our knowledge of LB and its differential diagnoses. 相似文献84.
Esther M. John Amanda I. Phipps Lisa M. Hines Jocelyn Koo Sue A. Ingles Kathy B. Baumgartner Martha L. Slattery Anna H. Wu 《International journal of cancer. Journal international du cancer》2020,147(7):1808-1822
We pooled multiethnic data from four population-based studies and examined associations of menstrual and reproductive characteristics with breast cancer (BC) risk by tumor hormone receptor (HR) status [defined by estrogen receptor (ER) and progesterone receptor (PR)]. We estimated odds ratios and 95% confidence intervals using multivariable logistic regression, stratified by age (<50, ≥50 years) and ethnicity, for 5,186 HR+ (ER+ or PR+) cases, 1,365 HR− (ER− and PR−) cases and 7,480 controls. For HR+ BC, later menarche and earlier menopause were associated with lower risk in non-Hispanic whites (NHWs) and Hispanics, and higher parity and longer breast-feeding were associated with lower risk in Hispanics and Asian Americans, and suggestively in NHWs. Positive associations with later first full-term pregnancy (FTP), longer interval between menarche and first FTP and shorter time since last FTP were limited to younger Hispanics and Asian Americans. Except for nulliparity, reproductive characteristics were not associated with risk in African Americans. For HR− BC, lower risk was associated with later menarche, except in African Americans and older Asian Americans and with longer breast-feeding in Hispanics and Asian Americans only. In younger African Americans, HR− BC risk associated with higher parity (≥3 vs. 1 FTP) was increased fourfold in women who never breast-fed, but not in those with a breast-feeding history, suggesting that breast-feeding may mitigate the adverse effect of higher parity in younger African American women. Further work needs to evaluate why menstrual and reproductive risk factors vary in importance according to age and ethnicity. 相似文献
85.
86.
I. Udroiu A. Sgura L. Vignoli M.A. Bologna M. D'Amen D. Salvi A. Ruzza A. Antoccia C. Tanzarella 《Environmental and molecular mutagenesis》2015,56(4):412-417
The amphibian micronucleus test has been widely used during the last 30 years to test the genotoxic properties of several chemicals and as a tool for ecogenotoxic monitoring. The vast majority of these studies were performed on peripheral blood of urodelan larvae and anuran tadpoles and to a lesser extent adults were also used. In this study, we developed protocols for measuring micronuclei in adult shed skin cells and larval gill cells of the Italian crested newt (Triturus carnifex). Amphibians were collected from ponds in two protected areas in Italy that differed in their radon content. Twenty‐three adult newts and 31 larvae were captured from the radon‐rich pond, while 20 adults and 27 larvae were taken from the radon‐free site. The animals were brought to the laboratory and the micronucleus test was performed on peripheral blood and shed skins taken from the adults and on larval gills. Samples from the radon‐rich site showed micronucleus frequencies higher than those from the radon‐free site and the difference was statistically significant in gill cells (P < 0.00001). Moreover, the larval gills seem to be more sensitive than the adult tissues. This method represents an easy (and noninvasive in the case of the shed skin) application of the micronucleus assay that can be useful for environmental studies in situ. Environ. Mol. Mutagen. 56:412–417, 2015. © 2014 Wiley Periodicals, Inc. 相似文献
87.
88.
89.
Monatsschrift Kinderheilkunde - Fusionen und Übernahmen in der Pharmaindustrie haben zu einer Konzentration geführt, von der auch die Impfstoffproduktion mit nur noch wenigen global... 相似文献
90.
A. Nast C. Smith P.I. Spuls G. Avila Valle Z. Bata-Csörgö H. Boonen E. De Jong I. Garcia-Doval P. Gisondi D. Kaur-Knudsen S. Mahil T. Mälkönen J.T. Maul S. Mburu U. Mrowietz K. Reich E. Remenyik K.M. Rønholt P.G. Sator M. Schmitt-Egenolf M. Sikora K. Strömer O. Sundnes D. Trigos G. Van Der Kraaij N. Yawalkar C. Dressler 《Journal of the European Academy of Dermatology and Venereology》2020,34(11):2461-2498
This evidence- and consensus-based guideline on the treatment of psoriasis vulgaris was developed following the EuroGuiDerm Guideline and Consensus Statement Development Manual. The first part of the guideline includes general information on the scope and purpose, health questions covered, target users and strength/limitations of the guideline. Suggestions for disease severity grading and treatment goals are provided. It presents the general treatment recommendations as well as detailed management and monitoring recommendations for the individual drugs. The treatment options discussed in this guideline are as follows: acitretin, ciclosporin, fumarates, methotrexate, adalimumab, apremilast, brodalumab, certolizumab pegol, etanercept, guselkumab, infliximab, ixekizumab, risankizumab, secukinumab, tildrakizumab and ustekinumab. 相似文献