全文获取类型
收费全文 | 684篇 |
免费 | 50篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 6篇 |
妇产科学 | 12篇 |
基础医学 | 137篇 |
口腔科学 | 1篇 |
临床医学 | 58篇 |
内科学 | 117篇 |
皮肤病学 | 25篇 |
神经病学 | 51篇 |
特种医学 | 32篇 |
外科学 | 146篇 |
综合类 | 9篇 |
一般理论 | 4篇 |
预防医学 | 54篇 |
眼科学 | 7篇 |
药学 | 34篇 |
中国医学 | 5篇 |
肿瘤学 | 39篇 |
出版年
2023年 | 7篇 |
2022年 | 17篇 |
2021年 | 29篇 |
2020年 | 21篇 |
2019年 | 26篇 |
2018年 | 24篇 |
2017年 | 6篇 |
2016年 | 18篇 |
2015年 | 16篇 |
2014年 | 30篇 |
2013年 | 31篇 |
2012年 | 33篇 |
2011年 | 36篇 |
2010年 | 22篇 |
2009年 | 27篇 |
2008年 | 31篇 |
2007年 | 35篇 |
2006年 | 26篇 |
2005年 | 34篇 |
2004年 | 32篇 |
2003年 | 22篇 |
2002年 | 18篇 |
2001年 | 15篇 |
2000年 | 22篇 |
1999年 | 17篇 |
1998年 | 5篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 15篇 |
1991年 | 4篇 |
1990年 | 16篇 |
1989年 | 8篇 |
1988年 | 11篇 |
1987年 | 10篇 |
1986年 | 10篇 |
1985年 | 10篇 |
1984年 | 5篇 |
1983年 | 2篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1974年 | 5篇 |
1973年 | 4篇 |
1972年 | 2篇 |
1971年 | 3篇 |
1970年 | 2篇 |
1968年 | 1篇 |
排序方式: 共有741条查询结果,搜索用时 218 毫秒
91.
BACKGROUND: Women appear to be more vulnerable than men to emotional distress (ED) However, ED often goes unrecognized by family physicians. PURPOSE: To (1) assess the rate of inquiry about ED by family physicians and (2) explore the association between physician's inquiry about ED and women's satisfaction with care. METHODS: Telephone interviews were conducted in 2003 using a structured questionnaire in a representative sample of 991 Israeli women aged 22 years or older, with a response rate of 84%. RESULTS: 33% of women reported ED during the past year but only 15% of women reported having discussed ED with their family physician in the last year. Higher rates of discussion of ED with the physician were found among women who had experienced ED (22.5%), those who had a chronic illness (20.1%) had low income (22.7%), and were Arabic (29.5%) or Russian speakers (26.3%). Multivariate analysis indicated that women who had discussed ED with their physician expressed higher satisfaction with the physicians professional level (OR = 6.85), attitude (OR = 2.45), spending enough time (OR = 2.90), and listening to the patient (OR = 3.19), compared with women who had not discussed ED with their physician. CONCLUSIONS: Given the current low rates of inquiry about ED, it appears that developing sensitivity to women's emotional concerns and encouraging physicians to inquire about ED should be given higher priority in medical education at all levels. Furthermore, since inquiry about ED not only improves the appropriateness of care but is also associated with higher satisfaction with the physician, organizations in a competitive health care environment may have a particular interest in promoting this practice. 相似文献
92.
93.
Florence Robert-Gangneux Yvon Sterkers Hélène Yera Isabelle Accoceberry Jean Menotti Sophie Cassaing Marie-Pierre Brenier-Pinchart Christophe Hennequin Laurence Delhaes Julie Bonhomme Isabelle Villena Emeline Scherer Frédéric Dalle Feriel Touafek Denis Filisetti Emmanuelle Varlet-Marie Hervé Pelloux Patrick Bastien 《Journal of clinical microbiology》2015,53(5):1677-1684
Toxoplasmosis is a life-threatening infection in immunocompromised patients (ICPs). The definitive diagnosis relies on parasite DNA detection, but little is known about the incidence and burden of disease in HIV-negative patients. A 3-year retrospective study was conducted in 15 reference laboratories from the network of the French National Reference Center for Toxoplasmosis, in order to record the frequency of Toxoplasma gondii DNA detection in ICPs and to review the molecular methods used for diagnosis and the prevention measures implemented in transplant patients. During the study period, of 31,640 PCRs performed on samples from ICPs, 610 were positive (323 patients). Blood (n = 337 samples), cerebrospinal fluid (n = 101 samples), and aqueous humor (n = 100 samples) were more frequently positive. Chemoprophylaxis schemes in transplant patients differed between centers. PCR follow-up of allogeneic hematopoietic stem cell transplant (allo-HSCT) patients was implemented in 8/15 centers. Data from 180 patients (13 centers) were further analyzed regarding clinical setting and outcome. Only 68/180 (38%) patients were HIV+; the remaining 62% consisted of 72 HSCT, 14 solid organ transplant, and 26 miscellaneous immunodeficiency patients. Cerebral toxoplasmosis and disseminated toxoplasmosis were most frequently observed in HIV and transplant patients, respectively. Of 72 allo-HSCT patients with a positive PCR result, 23 were asymptomatic; all were diagnosed in centers performing systematic blood PCR follow-up, and they received specific treatment. Overall survival of allo-HSCT patients at 2 months was better in centers with PCR follow-up than in other centers (P < 0.01). This study provides updated data on the frequency of toxoplasmosis in HIV-negative ICPs and suggests that regular PCR follow-up of allo-HSCT patients could guide preemptive treatment and improve outcome. 相似文献
94.
95.
David M Patrick Martin Petric Danuta M Skowronski Roland Guasparini Timothy F Booth Mel Krajden Patrick McGeer Nathalie Bastien Larry Gustafson Janet Dubord Diane Macdonald Samara T David Leila F Srour Robert Parker Anton Andonov Judith Isaac-Renton Nadine Loewen Gail McNabb Alan McNabb Swee-Han Goh Scott Henwick Caroline Astell Jian Ping Guo Michael Drebot Raymond Tellier Francis Plummer Robert C Brunham 《The Canadian Journal of Infectious Diseases & Medical Microbiology》2006,17(6):330-336
96.
97.
Jeanpierre S Nicolini FE Kaniewski B Dumontet C Rimokh R Puisieux A Maguer-Satta V 《Blood》2008,112(8):3154-3163
Activin A, BMP2, and BMP4, 3 members of the transforming growth factor-beta family, are involved in the regulation of hematopoiesis. Here, we explored the role of these molecules in human megakaryopoiesis using an in vitro serum-free assay. Our results highlight for the first time that, in the absence of thrombopoietin, BMP4 is able to induce CD34(+) progenitor differentiation into megakaryocytes through all stages. Although we have previously shown that activin A and BMP2 are involved in erythropoietic commitment, these molecules have no effect on human megakaryopoietic engagement and differentiation. Using signaling pathway-specific inhibitors, we show that BMP4, like thrombopoietin, exerts its effects on human megakaryopoiesis through the JAK/STAT and mTor pathways. Inhibition of the BMP signaling pathway with blocking antibodies, natural soluble inhibitors (FLRG or follistatin), or soluble BMP receptors reveals that thrombopoietin uses the BMP4 pathway to induce megakaryopoiesis, whereas the inverse is not occurring. Finally, we show that thrombopoietin up-regulates the BMP4 autocrine loop in megakaryocytic progenitors by inducing their production of BMP4 and up-regulating BMP receptor expression. In summary, this work indicates that BMP4 plays an important role in the control of human megakaryopoiesis. 相似文献
98.
Foci of meningeal myeloid metaplasia were found in 3 of 11 consecutive autopsied patients with myelofibrosis and agnogenic myeloid metaplasia. The clinical and pathological findings in an additional seven published patients with agnogenic myeloid metaplasia who developed neurological manifestations due to pressue of hemopoietic tumors in the central nervous system are reviewed. 相似文献
99.
Alireza Eshaghi Sarah Shalhoub Paul Rosenfeld Aimin Li Rachel R. Higgins Peter J. Stogios Alexei Savchenko Nathalie Bastien Yan Li Coleman Rotstein Jonathan B. Gubbay 《Antimicrobial agents and chemotherapy》2014,58(12):7188-7197
Immunocompromised patients are predisposed to infections caused by influenza virus. Influenza virus may produce considerable morbidity, including protracted illness and prolonged viral shedding in these patients, thus prompting higher doses and prolonged courses of antiviral therapy. This approach may promote the emergence of resistant strains. Characterization of neuraminidase (NA) inhibitor (NAI)-resistant strains of influenza A virus is essential for documenting causes of resistance. In this study, using quantitative real-time PCR along with conventional Sanger sequencing, we identified an NAI-resistant strain of influenza A (H3N2) virus in an immunocompromised patient. In-depth analysis by deep gene sequencing revealed that various known markers of antiviral resistance, including transient R292K and Q136K substitutions and a sustained E119K (N2 numbering) substitution in the NA protein emerged during prolonged antiviral therapy. In addition, a combination of a 4-amino-acid deletion at residues 245 to 248 (Δ245-248) accompanied by the E119V substitution occurred, causing resistance to or reduced inhibition by NAIs (oseltamivir, zanamivir, and peramivir). Resistant variants within a pool of viral quasispecies arose during combined antiviral treatment. More research is needed to understand the interplay of drug resistance mutations, viral fitness, and transmission. 相似文献
100.
F Pratlong M Portus P Rispail G Moreno P Bastien J A Rioux 《Annales de parasitologie humaine et comparée》1989,64(4):312-314
The concomitant presence of two zymodemes of the leishmania infantum complex. MON-1 and MON-77, is reported in a dog with diffuse leishmaniasis. The zymodemes were present in both the skin and lymph nodes. Possible explanations for the presence of the two zymodemes are discussed. 相似文献