全文获取类型
收费全文 | 3386篇 |
免费 | 226篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 57篇 |
儿科学 | 134篇 |
妇产科学 | 93篇 |
基础医学 | 480篇 |
口腔科学 | 126篇 |
临床医学 | 323篇 |
内科学 | 638篇 |
皮肤病学 | 26篇 |
神经病学 | 264篇 |
特种医学 | 101篇 |
外科学 | 349篇 |
综合类 | 24篇 |
一般理论 | 4篇 |
预防医学 | 298篇 |
眼科学 | 61篇 |
药学 | 356篇 |
中国医学 | 1篇 |
肿瘤学 | 282篇 |
出版年
2023年 | 16篇 |
2022年 | 32篇 |
2021年 | 44篇 |
2020年 | 52篇 |
2019年 | 72篇 |
2018年 | 88篇 |
2017年 | 67篇 |
2016年 | 98篇 |
2015年 | 99篇 |
2014年 | 113篇 |
2013年 | 183篇 |
2012年 | 238篇 |
2011年 | 220篇 |
2010年 | 135篇 |
2009年 | 137篇 |
2008年 | 234篇 |
2007年 | 238篇 |
2006年 | 249篇 |
2005年 | 193篇 |
2004年 | 194篇 |
2003年 | 160篇 |
2002年 | 179篇 |
2001年 | 24篇 |
2000年 | 17篇 |
1999年 | 24篇 |
1998年 | 43篇 |
1997年 | 40篇 |
1996年 | 54篇 |
1995年 | 27篇 |
1994年 | 27篇 |
1993年 | 26篇 |
1992年 | 18篇 |
1991年 | 19篇 |
1990年 | 22篇 |
1989年 | 19篇 |
1988年 | 17篇 |
1987年 | 13篇 |
1986年 | 18篇 |
1985年 | 19篇 |
1984年 | 16篇 |
1983年 | 9篇 |
1982年 | 8篇 |
1980年 | 7篇 |
1979年 | 13篇 |
1978年 | 15篇 |
1977年 | 10篇 |
1975年 | 10篇 |
1972年 | 7篇 |
1969年 | 5篇 |
1966年 | 7篇 |
排序方式: 共有3617条查询结果,搜索用时 15 毫秒
71.
Fredrik J. Vang Mats Lindström Charlotta Sunnqvist Jessica Bah-Rösman Aki Johanson Lil Träskman-Bendz 《Archives of Suicide Research》2013,17(3):214-229
In this study, we investigated how adversities related to past and present morbidity, and genotype. Forty-two, suicide attempters and 22 matched control patients were followed-up after 13 years. Life-time adversities were explored in an interview, and the patients were reassessed psychiatrically. The serotonin-transporter-linked promotor region (5-HTTLPR) was typed. More adversities were reported by suicide attempters than controls, and by still-ill than recovered suicide attempters. Adversities reported at follow-up were related to psychiatric morbidity at follow-up, but not to morbidity 13 years earlier. The 5-HTTLPR, genotype was associated with reported adversities, but not chances of recovery. Adversities potentially affected chronic morbidity. 5-HTTLPR genotype did not affect long-term recovery. 相似文献
72.
Karin Hjalmers Björn Söderfeldt Björn Axtelius Mats Kronström 《Acta odontologica Scandinavica》2013,71(3):158-162
Studies have shown that female unpromoted general practice (GP) dentists have a taxing work situation with many problems related to their psychosocial work environment. This study aims to describe: 1) the participation of this group in organized network activity (support groups) in a region (Scania) in Sweden, 2) the sense of support compared with another organization and with a nationwide sample of GP dentists, and 3) the covariation of network participation with support. All unpromoted female dentists within the Public Dental Health Service (PDHS) in Scania received a questionnaire and 94% responded. Those participating in network activity ≥4 times a year constituted 12% of respondents. Cooperation between colleagues was lower than in the nationwide sample. Support from the PDHS was experienced as weak. It was not possible to explain why female unpromoted GP dentists participated ≥4 times a year, while those who felt lonely in their work were to a higher degree participants in a network. Almost 9 out of 10 reported being strengthened by the network both as a person and in a professional role. The female dentist was three times more likely to participate in a network if she had a male head of clinic. The main findings are a paucity of inter‐colleague contact and a lack of association between support and network participation. The many affirmative comments indicated that network participation might be a good coping strategy for unpromoted female GP dentists. 相似文献
73.
Mats Sjöström DDS PhD Lars Sennerby DDS PhD Stefan Lundgren DDS PhD 《Clinical implant dentistry and related research》2013,15(3):367-379
Purpose: Evaluate correlations between volume change for iliac crest bone grafts in maxillary reconstruction (graft volume change [GVC]) and bone mineral density (BMD), bone volume fraction (BVF), hematologic bone metabolic factors (I), and identify indicators of implant failure (II). Material and Methods: Forty‐six consecutive patients had their edentulous atrophic maxilla reconstructed with free autogenous bone grafts from anterior iliac crest. Endosteal implants were placed 6 months after graft healing. Computer tomography was performed after 3 weeks and 6 months after grafting. Bone biopsies were taken from the internal table of donor site for calculation (BVF), and blood samples were collected. Implant stability was measured at placement with resonance frequency analysis and expressed as implant stability quotient (ISQ). Implant failure was registered. Results: GVC in onlay bone graft was 37%. The BVF in iliac crest biopsies was 32%. Serum‐IGFBP3 differed with 79% of the samples over normal range. Fifteen patients had one or more implant failures prior to loading (early failures). Forty‐two patients were followed for a minimum of 3 years after implant loading and, in addition, 6/42 patients had one or more implants removed during the follow‐up (late failures). GVC correlated to decreased BMD of lumbar vertebrae L2‐L4 (Kruskal–Wallis test, p = .017). No correlation was found between GVC and hematologic factors (Pearson correlation test) or between GVC and BVF (Kruskal–Wallis test). No correlation was found between ISQ and GVC (Pearson correlation test, p = .865). The association between implant failures and the described factors were evaluated, and no significant correlations were found (unconditional logistic regression). Conclusion: Onlay bone grafts decrease 37% during initial healing period, which correlate to BMD of lumbar vertebrae L2‐L4. No other evaluated parameters could explain GVC. The evaluated factors could not explain implant failure. 相似文献
74.
U Forslöw O Blennow K Leblanc O Ringdén B Gustafsson J Mattsson M Remberger 《European journal of haematology》2012,89(3):220-227
We performed a retrospective cohort study to find out whether the use of reduced‐intensity conditioning (RIC) might reduce the risk of early death from pneumonia. Pneumonia‐associated deaths were evaluated in 691 hematopoietic stem cell transplantation (HSCT) patients. The majority had a hematological malignancy (n = 504) and an HLA‐matched donor (n = 584). RIC was given to 336 patients and myeloablative conditioning (MAC) to 355. Data concerning radiology, culture and autopsy results were evaluated together with risk factors for death related to pneumonia within or after 100 d after HSCT (early and overall pneumonia). In 60 patients, pneumonia contributed to death (early n = 17). The cumulative incidence of early pneumonia‐related death was 2.8% and 2.1% in MAC and RIC patients, respectively. The cumulative incidence of overall pneumonia‐related death was 8.2% and 10.5%, respectively. In 40 patients, (67%) an etiology could be established, with 19 patients having proven or probable mold infection. In the multivariate analyses, acute graft‐versus‐host disease (GVHD) grades II–IV, cytomegalovirus (CMV) infection and having received mesenchymal stromal cells (MSCs) were factors associated with overall pneumonia‐related death. Bacteremia and a previous HSCT were associated with early pneumonia‐related death. RIC did not reduce the incidence of early death associated with pneumonia. Acute GVHD II–IV, CMV infection and MSC treatment were factors associated with pneumonia‐related death. Mold infection was the most common contributor to pneumonia‐related death in HSCT patients. 相似文献
75.
76.
77.
78.
M Uhlin J Gertow M Uzunel M Okas S Berglund E Watz M Brune P Ljungman M Maeurer J Mattsson 《Clinical infectious diseases》2012,55(8):1064-1073
Background.?Viral infections are major complications after allogeneic hematopoietic stem cell transplantation (HSCT). During posttransplant immunosuppression the regular T-cell control is compromised. Even if treatment strategies against infections caused by herpes viruses such as cytomegalovirus, Epstein-Barr virus, and adenovirus have improved, the mortality rate is still considerable. If primary antiviral therapy fails or cannot be tolerated, adoptive therapy with virus-specific cytotoxic T cells (CTL) can be utilized. Methods.?In this study, we used virus-specific CTLs to treat 8 patients suffering from severe viral infections after allogeneic HSCT. Using positive selection with HLA multimers and magnetic beads, we isolated CTLs from both frozen donor material as well as third-party donors within hours. Results.?At 90 days after CTL infusions 7 out of 8 patients were still living. CTLs infused from third-party donors were detected in 5 of 6 patients up to 76 days after infusion. No graft-versus-host disease associated with CTL infusions was observed. Conclusions.?Our separation approach offers a rapid alternative for adoptive CTL therapy if primary antiviral treatment strategies fail. Because no prolonged expansion steps are needed, this method may be used for early treatment of patients suffering from life-threatening infectious complications. 相似文献
79.
10 patients with major instability symptoms due to an acute anterior cruciate ligament injury were operated on with a bone-patellar tendon-bone reconstruction. Tibial condyle bone mineral density (BMD), bone ingrowth and changes in diameter in the tibia bone tunnel were studied with quantified computed tomography (QCT) postoperatively and after 1, 3, 6 and 12 months. We found no sign of bone ingrowth in the form of increased bone mineral density (BMD) in the bone tunnels in any of the patients. The tunnel diameter increased in all patients during the first postoperative months. After 1 year, 5 patients had a smaller diameter than at the first postoperative examination, 2 had the same diameter as immediately after surgery and 2 patients had a larger diameter. A sclerotic zone developed in all patients along the perimeter of the tunnel during the 3-6 months of follow-up. The BMD in the tibial condyle decreased at 3 months; it then increased, but between 6 and 12 months, it levelled out and was slightly lower than postoperatively. In conclusion, we found no growth of bone into the tunnel and tendinous part of the graft during the first postoperative year. 相似文献
80.
Mats Adler Benny Liberg Stig Andersson Göran Isacsson Jerker Hetta 《Nordic journal of psychiatry》2013,67(2):130-135
Most rating scales for affective disorders measure either depressive or hypomanic/manic symptoms and there are few scales for hypomania/mania in a self-rating format. We wanted to develop and validate a self-rating scale for comprehensive assessment of depressive, manic/hypomanic and mixed affective states. We developed an 18-item self-rating scale starting with the DSM-IV criteria for depression and mania, with subscales for depression and mania. The scale was evaluated on 61 patients with a diagnosis of affective disorder, predominantly bipolar disorder type I, using Montgomery–Åsberg Depression Rating Scale (MADRS), Hypomania Interview Guide—Clinical version (HIGH-C) and Clinical Global Impression scale, modified for bipolar patients (CGI-BP) as reference scales. Internal consistency of the scale measured by Cronbach's alpha was 0.89 for the depression subscale and 0.91 for the mania subscale. Spearman's correlation coefficients (two-tailed) between the depression subscale and MADRS was 0.74 (P<0.01) and between mania subscale and HIGH-C 0.80 (P<0.01). A rotated factor analysis of the scale supported the separation of symptoms in the mania and depression subscale. We established that the self-rating scales sensitivity to identify mixed states, with combined cut-offs on the MADRS and HIGH-C as reference, was 0.90 with a specificity of 0.71. The study shows that the Affective Self Rating Scale is highly correlated with ratings of established interview scales for depression and mania and that it may aid the detection of mixed affective states. 相似文献