全文获取类型
收费全文 | 854篇 |
免费 | 38篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 51篇 |
妇产科学 | 100篇 |
基础医学 | 105篇 |
口腔科学 | 22篇 |
临床医学 | 31篇 |
内科学 | 155篇 |
皮肤病学 | 73篇 |
神经病学 | 26篇 |
特种医学 | 17篇 |
外科学 | 103篇 |
综合类 | 16篇 |
预防医学 | 55篇 |
眼科学 | 25篇 |
药学 | 62篇 |
中国医学 | 2篇 |
肿瘤学 | 44篇 |
出版年
2024年 | 3篇 |
2023年 | 9篇 |
2022年 | 9篇 |
2021年 | 32篇 |
2020年 | 15篇 |
2019年 | 24篇 |
2018年 | 27篇 |
2017年 | 23篇 |
2016年 | 34篇 |
2015年 | 24篇 |
2014年 | 26篇 |
2013年 | 49篇 |
2012年 | 64篇 |
2011年 | 70篇 |
2010年 | 31篇 |
2009年 | 35篇 |
2008年 | 40篇 |
2007年 | 60篇 |
2006年 | 55篇 |
2005年 | 50篇 |
2004年 | 47篇 |
2003年 | 53篇 |
2002年 | 39篇 |
2001年 | 18篇 |
2000年 | 10篇 |
1999年 | 13篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 7篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1981年 | 1篇 |
排序方式: 共有893条查询结果,搜索用时 15 毫秒
1.
Uday Yanamandra Prateek Deo Kamal Kant Sahu Ram Vasudevan Nampoothiri Nalini Gupta Anusree Prabhakaran Deb Prasad Dhibhar Alka Khadwal Gaurav Prakash Man Upadesh Singh Sachdeva Deepesh Lad Neelam Varma Subhash Varma Pankaj Malhotra 《Clinical Lymphoma, Myeloma & Leukemia》2019,19(3):183-189.e1
Background
Multiple myeloma (MM) is a hematologic malignancy of plasma cell origin. MM primarily affects bone marrow, but extramedullary sites can also be involved. Myelomatous pleural effusion (MPE) is an atypical and rare complication of MM. We aimed to systematically study the incidence and clinicopathologic profile of patients with MPE in a real-world setting.Patients and Methods
In this retrospective study, 415 consecutive patients with MM managed at a tertiary care center in North India during a study period of January 1, 2010 to December 31, 2015 were evaluated for MPE. The patients with MPE were analyzed for their clinical profile, diagnosis, treatment, and outcomes.Results
Of these 415 patients, 11 (2.65%) patients had MPE. The median age of the study population was 50 years with male preponderance. The majority of these patients had immunoglobin (Ig)G Kappa disease. All patients had higher than International Staging System stage I disease. MPE was a presenting feature at MM diagnosis in 45.45% (n = 5) of the patients, whereas the rest developed MPE during follow-up. MPE presented predominantly (81.8%) as a unilateral effusion. Concurrent extramedullary involvement at other site was seen in 45.45% (n = 5), with 3 (27%) patients having concurrent myelomatous ascites. Six of these were managed aggressively, whereas 5 patients opted for palliation. The outcomes were dismal (90.9% mortality), with a median survival of 2.47 months.Conclusion
MPE is a rare entity, and positive outcomes of therapy remain low with dismal prognosis. 相似文献2.
Immune responses induced by two dose strengths of an yeast-derived recombinant hepatitis B vaccine in adolescents. 总被引:2,自引:0,他引:2
3.
Histopathology reports are important quality assurance tools and evaluation of pathological diagnoses described in them is an integral part of total quality control and quality improvement program. We describe a program based on slide circulation which was aimed at both continuing education to upgrade knowledge and proficiency testing of histopathologists. The performance of the participating pathologists was analyzed and the degree of agreement was also studied. The results showed improvement indicated by rising level of performance in 35.3% of consistent participants and increasing trend in the average score. The degree of agreement was comparatively low (65.29%). The practicability of this program and its acceptability as an EQAS was also investigated. 相似文献
4.
Elaine Tierney Irena Bukelis Richard E Thompson Khalid Ahmed Alka Aneja Lisa Kratz Richard I Kelley 《American journal of medical genetics. Part B, Neuropsychiatric genetics》2006,(6):666-668
Although Smith-Lemli-Opitz Syndrome (SLOS), a genetic condition of impaired cholesterol biosynthesis, is associated with autism [Tierney et al., 2001; Am J Med Genet 98:191-200.], the incidence of SLOS and other sterol disorders among individuals with autism spectrum disorders (ASD) is unknown. This study investigated (1) the incidence of biochemically diagnosed SLOS in blood samples from a cohort of subjects with ASD from families in which more than one individual had ASD and (2) the type and incidence of other sterol disorders in the same group. Using gas chromatography/mass spectrometry, cholesterol, and its precursor sterols were quantified in 100 samples from subjects with ASD obtained from the Autism Genetic Resource Exchange (AGRE) specimen repository. Although no sample had sterol levels consistent with SLOS, 19 samples had total cholesterol levels lower than 100 mg/dl, which is below the 5th centile for children over age 2 years. These findings suggest that, in addition to SLOS, there may be other disorders of sterol metabolism or homeostasis associated with ASD. 相似文献
5.
6.
Maternal and Child Health Journal - While the city offers economic opportunities for women in many countries, their safety and security remain vulnerable to urban violence, especially in poor... 相似文献
7.
8.
Effects of chronic treatment with valproate on serotonin-1A receptor binding and function 总被引:1,自引:0,他引:1
Valproate is effective in treating bipolar disorder characterized by rapid cycling or acute mania, although the mechanism of action is unclear. In contrast to other treatments for depression, 21 days of treatment in rats with valproate (100, 200 or 400 mg/kg) did not significantly alter the hypothermia induced by 8-hydroxy-2-(di-n-propyl)aminotetralin (8-OH-DPAT), an agonist at serotonin-1A receptors. Treatment with valproate also had no effect on radioligand binding to serotonin-1A, serotonin-2 or -adrenergic receptors. Based on these animal studies in frontal cortex and hippocampus, the therapeutic benefit of valproate in mood disorders does not appear to involve adaptive changes in serotonin-1A, serotonin-2 or -adrenergic receptor number. 相似文献
9.
H. Özbey C. Boneval Ü. Alkaç B. Bavbek G. Çakiroğlu T. Salman A. Çelik 《Pediatric surgery international》1996,11(8):547-549
It is known that polycythemia decreases the fluidity of the blood and impairs tissue perfusion due to red-cell sludging in the microcirculation. In this study, the effect of polycythemic hyperviscosity (PH) on bowel necrosis was evaluated in an experimental model of intestinal ischemia. Twenty-eight Wistar albino rats (90–170 g) were divided into two groups: group 1 was transfused to create hyperviscosity and then intestinal ischemia was produced (n = 16); in group 2 ischemia was produced without transfusion (n = 12). Intestinal ischemia was produced by clamping the superior mesenteric artery and the collateral arcades of the right colic artery for 30 min. Gross and histopathologic evaluations were performed by either immediate necropsy or relaparotomy 24 h later. Microscopic findings were graded from 0 to 3 according to the degree of ischemic changes. In group 1, 2 animals (12.5%) died before 24 h postoperatively; coagulation necrosis with grade 2 or 3 ischemic changes was observed in 10 animals (62.5%). In group 2 only a few hypertrophied Peyer's patches and capillary dilation were found, and all histopathologic changes were between grades 0 and 1. The difference between the histopathologic gradings of the two groups was significant (P < 0.001). It appears that in addition to reduced splanchnic blood flow, a secondary effect of PH is needed to induce ischemic coagulation necrosis. PH of the newborn must be considered a risk factor for necrotizing enterocolitis, so-called spontaneous intestinal perforations, and even intestinal atresia.Presented at the 1st European Congress of Pediatric Surgery, Graz/Austria, May 4–6, 1995 相似文献
10.