全文获取类型
收费全文 | 2370679篇 |
免费 | 174402篇 |
国内免费 | 3476篇 |
专业分类
耳鼻咽喉 | 32271篇 |
儿科学 | 76323篇 |
妇产科学 | 63106篇 |
基础医学 | 351472篇 |
口腔科学 | 63853篇 |
临床医学 | 213496篇 |
内科学 | 462807篇 |
皮肤病学 | 52072篇 |
神经病学 | 187192篇 |
特种医学 | 88959篇 |
外国民族医学 | 496篇 |
外科学 | 357764篇 |
综合类 | 47570篇 |
现状与发展 | 12篇 |
一般理论 | 852篇 |
预防医学 | 183993篇 |
眼科学 | 54521篇 |
药学 | 176344篇 |
11篇 | |
中国医学 | 4612篇 |
肿瘤学 | 130831篇 |
出版年
2021年 | 19512篇 |
2019年 | 20049篇 |
2018年 | 27667篇 |
2017年 | 20772篇 |
2016年 | 23243篇 |
2015年 | 26280篇 |
2014年 | 36956篇 |
2013年 | 55047篇 |
2012年 | 76413篇 |
2011年 | 81144篇 |
2010年 | 48060篇 |
2009年 | 45586篇 |
2008年 | 76128篇 |
2007年 | 81022篇 |
2006年 | 81820篇 |
2005年 | 79362篇 |
2004年 | 75816篇 |
2003年 | 73053篇 |
2002年 | 70628篇 |
2001年 | 108917篇 |
2000年 | 111570篇 |
1999年 | 93681篇 |
1998年 | 27232篇 |
1997年 | 23879篇 |
1996年 | 24233篇 |
1995年 | 22866篇 |
1994年 | 21002篇 |
1993年 | 19847篇 |
1992年 | 72089篇 |
1991年 | 70136篇 |
1990年 | 68459篇 |
1989年 | 65709篇 |
1988年 | 60349篇 |
1987年 | 59160篇 |
1986年 | 55256篇 |
1985年 | 53045篇 |
1984年 | 39351篇 |
1983年 | 33439篇 |
1982年 | 19895篇 |
1979年 | 35885篇 |
1978年 | 25665篇 |
1977年 | 21245篇 |
1976年 | 20344篇 |
1975年 | 21833篇 |
1974年 | 26158篇 |
1973年 | 24813篇 |
1972年 | 23212篇 |
1971年 | 22044篇 |
1970年 | 20255篇 |
1969年 | 19322篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
Haya Mohammed BSc MChB M. Yousuf Salmasi MRCS Massimo Caputo PhD Gianni D. Angelini PhD Hunaid A. Vohra PhD 《Journal of cardiac surgery》2020,35(6):1209-1219
Background
Limited data exists demonstrating the efficacy of minimally invasive surgery (MIS) compared to median sternotomy (MS) for multiple valvular disease (MVD). This systematic review and meta-analysis aims to compare operative and peri-operative outcomes of MIS vs MS in MVD.Methods
PubMed, Ovid, and Embase were searched from inception until August 2019 for randomized and observational studies comparing MIS and MS in patients with MVD. Clinical outcomes of intra- and postoperative times, reoperation for bleeding and surgical site infection were evaluated.Results
Five observational studies comparing 340 MIS vs 414 MS patients were eligible for qualitative and quantitative review. The quality of evidence assessed using the Newcastle-Ottawa scale was good for all included studies. Meta-analysis demonstrated increased cardiopulmonary bypass time for MIS patients (weighted mean difference [WMD], 0.487; 95% confidence interval [CI], 0.365-0.608; P < .0001). Similarly, aortic cross-clamp time was longer in patients undergoing MIS (WMD, 0.632; 95% CI, 0.509-0.755; P < .0001). No differences were found in operative mortality, reoperation for bleeding, surgical site infection, or hospital stay.Conclusions
MIS for MVD have similar short-term outcomes compared to MS. This adds value to the use of minimally invasive methods for multivalvular surgery, despite conferring longer operative times. However, the paucity in literature and learning curve associated with MIS warrants further evidence, ideally randomized control trials, to support these findings.112.
113.
114.
Focal hyperhidrosis secondary to eccrine naevus successfully treated with botulinum toxin type A
下载免费PDF全文
![点击此处可从《Clinical and experimental dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Eccrine naevus (EN) is a rare skin hamartoma included in the organoid group of epidermal naevi, histologically defined as focal hyperplasia and/or hypertrophy of eccrine glands. Clinically, EN usually presents as hyperhidrotic patches with no visible skin changes, frequently located on the forearms. The decision to treat EN or not usually depends on the grade of hyperhidrosis, but there is no therapeutic consensus because of the rarity of this condition. We present a case diagnosed as EN in an adult patient with severe localized hyperhidrosis, which was successfully treated with botulinum toxin. 相似文献
115.
116.
117.
Elizabeth M. Broad Laura J. Newsome Dustin A. Dew 《The journal of spinal cord medicine》2020,43(3):388-397
Objective: Report measured resting energy expenditure (REE) in wheelchair rugby athletes and evaluate agreement between REE and the prediction models of Chun, Cunningham, Harris-Benedict, Mifflin, Nightingale and Gorgey, and Owen.Design: Cohort-based validation study.Setting. Paralympic team training camp.Participants: Fourteen internationally competitive athletes who play wheelchair rugby, 13 of whom had cervical spinal cord injuries (SCI).Outcome Measures: A portable metabolic analyzer was used to measure REE following an overnight fast and dual-energy X-ray absorptiometry (DXA) was used to assess lean body mass for the prediction equations.Results: REE in the current sample was 1735?±?257?kcal?×?day?1 ranging from 1324 to 2068?kcal?×?day?1. Bland–Altman analyses revealed negative mean bias but similar limits of agreement between measured REE and scores predicted by Chun, Cunningham, Mifflin, Nightingale and Gorgey, and Owen models in elite athletes who play wheelchair rugby.Conclusion: Prediction models regressed on persons with and without SCI under-predicted REE of competitive wheelchair rugby athletes. This outcome may be explained by the higher REE/fat-free mass (FFM) ratio of current athletes compared to less active samples. Findings from the current study will help practitioners to determine nutrient intake needs on training days of varied intensity. 相似文献
118.
119.
Widely Metastatic Squamous Cell Carcinoma Originating from Malignant Transformation of Hypertrophic Lichen Planus in a 24‐Year‐Old Woman: Case Report and Review of the Literature
下载免费PDF全文
![点击此处可从《Pediatric dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Lana X. Tong B.A. Matthew J. Weinstock M.D. Reed Drews M.D. Caroline C. Kim M.D. 《Pediatric dermatology》2015,32(3):e98-e101
Hypertrophic lichen planus (HLP) is a T‐cell‐mediated process typically presenting with hypertrophic or verrucous plaques on the lower limbs. We report the case of a 24‐year‐old woman with a history of HLP since age 3 years presenting with rapid malignant transformation of one lesion into a large squamous cell carcinoma (SCC). Subsequent examination revealed progressive, widespread metastatic involvement, and the patient ultimately died from her disease. SCC associated with HLP is rare, with a review of the literature revealing fewer than 50 cases. This case highlights the need to be aware of suspicious changes in HLP and to educate patients as to when to be reevaluated. 相似文献
120.
Iclea Rocha Gama Euclides Marinho Trindade-Filho Suzana Lima Oliveira Nassib Bezerra Bueno Isabelle Tenório Melo Cyro Rego Cabral-Junior Elenita M. Barros Jaqueline A. Galvão Wanessa S. Pereira Raphaela C. Ferreira Bruna R. Domingos Terezinha da Rocha Ataide 《Metabolic brain disease》2015,30(1):93-98