全文获取类型
收费全文 | 2145篇 |
免费 | 129篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 39篇 |
妇产科学 | 55篇 |
基础医学 | 288篇 |
口腔科学 | 13篇 |
临床医学 | 220篇 |
内科学 | 468篇 |
皮肤病学 | 55篇 |
神经病学 | 307篇 |
特种医学 | 102篇 |
外科学 | 192篇 |
综合类 | 6篇 |
预防医学 | 133篇 |
眼科学 | 20篇 |
药学 | 179篇 |
中国医学 | 5篇 |
肿瘤学 | 201篇 |
出版年
2023年 | 19篇 |
2022年 | 57篇 |
2021年 | 63篇 |
2020年 | 33篇 |
2019年 | 39篇 |
2018年 | 62篇 |
2017年 | 49篇 |
2016年 | 62篇 |
2015年 | 68篇 |
2014年 | 78篇 |
2013年 | 99篇 |
2012年 | 167篇 |
2011年 | 163篇 |
2010年 | 90篇 |
2009年 | 96篇 |
2008年 | 163篇 |
2007年 | 160篇 |
2006年 | 137篇 |
2005年 | 123篇 |
2004年 | 135篇 |
2003年 | 114篇 |
2002年 | 89篇 |
2001年 | 25篇 |
2000年 | 17篇 |
1999年 | 22篇 |
1998年 | 10篇 |
1997年 | 15篇 |
1996年 | 12篇 |
1995年 | 11篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 10篇 |
1991年 | 6篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 6篇 |
1985年 | 8篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1977年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1961年 | 1篇 |
1945年 | 9篇 |
1943年 | 4篇 |
排序方式: 共有2291条查询结果,搜索用时 15 毫秒
51.
Chiaravalloti Nancy D. Amato Maria Pia Brichetto Giampaolo Chataway Jeremy Dalgas Ulrik DeLuca John Meza Cecilia Moore Nancy B. Feys Peter Filippi Massimo Freeman Jennifer Inglese Matilde Motl Rob Rocca Maria Assunta Sandroff Brian M. Salter Amber Cutter Gary Feinstein Anthony 《Journal of neurology》2021,268(5):1598-1607
Journal of Neurology - Individuals with pre-existing chronic illness have shown increased anxiety and depression due to COVID-19. Here, we examine the impact of the COVID-19 pandemic on emotional... 相似文献
52.
p.Leu636Pro mutation is associated with cystic fibrosis transmembrane conductance regulator‐related disorders (congenital bilateral absence of vas deferens)
下载免费PDF全文
![点击此处可从《International journal of urology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
53.
54.
Fantoni C Regoli F Ghanem A Raffa S Klersy C Sorgente A Faletra F Baravelli M Inglese L Salerno-Uriarte JA Klein HU Moccetti T Auricchio A 《European journal of heart failure》2008,10(3):298-307
BACKGROUND: Diabetes mellitus is an independent risk factor for increased morbidity and mortality in heart failure (HF) patients. AIMS: To compare functional and structural improvement, as well as long-term outcome, between diabetic and non-diabetic HF patients treated with cardiac resynchronization therapy (CRT). METHODS: We compared response to CRT in 141 diabetic and 214 non-diabetic consecutive patients. Major events were; death from any cause, urgent heart transplantation and implantation of a left ventricular (LV) assist device. Frequencies of hospitalisation and defibrillator (CRT-D) discharges were also analyzed. RESULTS: CRT was able to significantly improve functional capacity, ventricular geometry and neurohumoral imbalance in both diabetic and non-diabetic patients over a median follow-up time of 34 months. Overall event-free survival was similar in diabetic and non-diabetic patients (HR 1.23, p=0.363), as was survival free from CRT-D interventions (HR 1.72; p=0.115) and hospitalisations (HR 1.12; p=0.500). On multivariable analysis, NYHA class IV (p=0.002), low LV ejection fraction (p=0.002), absence of beta-blocker therapy (p<0.001), impaired renal function (p=0.003), presence of an epicardial lead (p=0.025), but not diabetes (p=0.821) were associated with a poor outcome after CRT. CONCLUSIONS: Diabetic HF patients treated with CRT had a very favourable functional and survival outcome, which was comparable to non-diabetic patients. 相似文献
55.
Stefano?ScaringiEmail authorView authors OrcID profile Annamaria?Di?Bella Luca?Boni Francesco?Giudici Carmela?Di?Martino Daniela?Zambonin Ferdinando?Ficari 《International journal of colorectal disease》2018,33(4):479-485
Background and aims
Surgical management of Crohn’s colitis represents one of the most complex situations in colorectal surgery. Segmental colectomy (SC) and total abdominal colectomy with ileorectal anastomosis (TAC-IRA) are the most common procedures, but there are few available data on their long-term outcome. The aim of the present study was to analyze the long-term outcome of patients who underwent segmental colectomy for Crohn’s colitis, with regard to the risk for total abdominal colectomy.Methods
In this observational, monocentric, retrospective analysis, we analyzed patients who received a segmental colectomy for Crohn’s colitis at our institution. The database was updated by asking patients to complete a questionnaire by telephone or at the outpatient clinic. Only patients followed up at our Hospital were included. Patients were followed up by a specialized multidisciplinary team (IBD Unit). The primary endpoint was the interval between segmental colectomy and, when performed, total abdominal colectomy.Results
Between 1973 and 2014, 200 patients underwent segmental colectomy for Crohn’s colitis. The median follow-up was 13.5 years (interquartile range [IQR] 7.8–21.5). Overall, 62 patients (31%) had a surgical recurrence, of these, 42 (21%) received total abdominal colectomy. At multivariate analysis, the presence of ≥?3 sites (HR =?2.47; 95% CI 1.22–5.00; p?=?0.018) and perianal disease (HR =?3.23; 95% CI 1.29–8.07; p?=?0.006) proved to be risk factors for total abdominal colectomy.Conclusions
The risk for surgical recurrence after SC for Crohn’s colitis is acceptable. We recommend a bowel-sparing policy for the treatment of Crohn’s colitis in any case in which the extent of the disease at the moment of surgery makes the conservative approach achievable.56.
Max Wagener Gino Lee Fabio Stallone Tanja Marxer Christian Puelacher Carmela Schumacher Seoung Mann Sou Raphael Twerenbold Tobias Reichlin Thomas Hochgruber Yunus Tanglay Michael Freese Damian Wild Katharina Rentsch Stefan Osswald Michael Zellweger Christian Mueller 《European journal of clinical investigation》2015,45(11):1175-1183
57.
58.
Hernández-Rodríguez J Tan CD Koening CL Khasnis A Rodríguez ER Hoffman GS 《Medicine》2012,91(2):75-85
Testicular vasculitis (TV) may be part of systemic (testicular) vasculitis (STV) or may exist as single-organ/isolated (testicular) vasculitis (ITV). In the current study we sought to identify clinical and histologic features that distinguish STV from ITV. The distinction was deemed important because it is already well established that in other forms of single organ vasculitis, surgical therapy alone may be curative. We identified patients with biopsy-proven TV from pathology databases from our institution and from an English-language PubMed search. Patients were included if data were available to determine TV extent confidently. Data recorded included clinical, laboratory, and histologic features; treatment; and clinical follow-up. The study included 72 patients with TV (mean age, 42 yr; range, 4-78 yr) (7 from our institution). About 74% of patients presented with painful testicular swelling/mass, 10% with a painless testicular swelling/mass, and 4% with epididymal swelling/mass. Eleven percent had no testicular complaints and vasculitis was discovered at autopsy or in other surgical interventions. Vasculitis involved the testicle in 80.3% of cases, the epididymis in 44.6%, and the spermatic cord in 30.6%. Thirty-seven (51%) patients had ITV and 35 (49%) had STV. No differences between ITV and STV patients were found in regards to age, presenting testicular features, duration of testicular symptoms, and time of follow-up. Compared to ITV patients, STV patients presented more often with constitutional/musculoskeletal symptoms (74.3% vs. 8.3%, respectively; p = 0.0001), elevated erythrocyte sedimentation rate (94.7% vs. 16%; p = 0.0001), and anemia (50% vs. 0%; p = 0.0001). Neoplasm was more frequently suspected in ITV than in STV (74.2% vs. 31.6%; p = 0.001), but only occurred in 2 ITV patients. Long-term glucocorticoid therapy was given only to STV patients, and 59.1% of them also received cytotoxic agents. ITV was diagnosed more often by orchiectomy (81.1% vs. 42.9%; p = 0.001) and less frequently by testicular biopsy (2.7% vs. 28.6%; p = 0.003) than STV. Nongranulomatous inflammation affecting medium-sized vessels occurred in most patients with both ITV and STV. Among STV, polyarteritis nodosa was the most frequently diagnosed (63%), followed by Wegener granulomatosis (17%).In summary, TV occurs as ITV in men usually presenting with a testicular mass in the absence of systemic symptoms and normal laboratory results. In most ITV patients, a testicular neoplasm is initially suspected, and TV is an unexpected finding. After surgical removal, ITV does not require systemic therapy. Polyarteritis nodosa is the systemic vasculitis most frequently associated with testicular involvement. 相似文献
59.
Novo G Rizzo M La Carruba S Caruso M Amoroso GR Balistreri CR Coppola G Evola G Caruso C Assennato P Novo S Mancuso D 《Angiology》2012,63(2):127-130
We assessed whether macrophage colony-stimulating factor (M-CSF) levels are associated with left ventricular systolic dysfunction (LVSD) in patients with acute myocardial infarction (AMI). We studied 56 patients with AMI (mean age: 67 ± 12 years) and identified those with clinical (Killip class >II) or echocardiographic signs (ejection fraction ≤45%) of LVSD. We evaluated the established cardiovascular risk factors and measured several cardiovascular biomarkers, including M-CSF. Serum M-CSF concentrations (pg/mL) were significantly increased in patients with both clinical and echocardiographic signs of LVSD (460 ± 265 vs 290 ± 210, P = .0103 and 493 ± 299 vs 287 ± 174, P = .0028, respectively). We found a significant inverse association between M-CSF and ejection fraction (r = -.351, P = .0079). Logistic regression analysis revealed that, among all evaluated clinical and biochemical parameters, the stronger predictor of LVSD was M-CSF (odds ratios 2.1, 95% confidence interval 1.1-2.9, P = .0168). This is the first study reporting plasma M-CSF levels as independent determinants of low LV ejection fraction and clinical LV dysfunction in patients with AMI. 相似文献
60.
Fang J Rhyasen G Bolanos L Rasch C Varney M Wunderlich M Goyama S Jansen G Cloos J Rigolino C Cortelezzi A Mulloy JC Oliva EN Cuzzola M Starczynowski DT 《Blood》2012,120(4):858-867
Bortezomib (Velcade) is used widely for the treatment of various human cancers; however, its mechanisms of action are not fully understood, particularly in myeloid malignancies. Bortezomib is a selective and reversible inhibitor of the proteasome. Paradoxically, we find that bortezomib induces proteasome-independent degradation of the TRAF6 protein, but not mRNA, in myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) cell lines and primary cells. The reduction in TRAF6 protein coincides with bortezomib-induced autophagy, and subsequently with apoptosis in MDS/AML cells. RNAi-mediated knockdown of TRAF6 sensitized bortezomib-sensitive and -resistant cell lines, underscoring the importance of TRAF6 in bortezomib-induced cytotoxicity. Bortezomib-resistant cells expressing an shRNA targeting TRAF6 were resensitized to the cytotoxic effects of bortezomib due to down-regulation of the proteasomal subunit α-1 (PSMA1). To determine the molecular consequences of loss of TRAF6 in MDS/AML cells, in the present study, we applied gene-expression profiling and identified an apoptosis gene signature. Knockdown of TRAF6 in MDS/AML cell lines or patient samples resulted in rapid apoptosis and impaired malignant hematopoietic stem/progenitor function. In summary, we describe herein novel mechanisms by which TRAF6 is regulated through bortezomib/autophagy-mediated degradation and by which it alters MDS/AML sensitivity to bortezomib by controlling PSMA1 expression. 相似文献