全文获取类型
收费全文 | 2239篇 |
免费 | 172篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 48篇 |
儿科学 | 54篇 |
妇产科学 | 80篇 |
基础医学 | 331篇 |
口腔科学 | 49篇 |
临床医学 | 238篇 |
内科学 | 336篇 |
皮肤病学 | 147篇 |
神经病学 | 191篇 |
特种医学 | 53篇 |
外科学 | 181篇 |
综合类 | 17篇 |
一般理论 | 6篇 |
预防医学 | 270篇 |
眼科学 | 32篇 |
药学 | 136篇 |
中国医学 | 1篇 |
肿瘤学 | 248篇 |
出版年
2023年 | 29篇 |
2022年 | 45篇 |
2021年 | 88篇 |
2020年 | 65篇 |
2019年 | 75篇 |
2018年 | 88篇 |
2017年 | 60篇 |
2016年 | 78篇 |
2015年 | 52篇 |
2014年 | 78篇 |
2013年 | 125篇 |
2012年 | 146篇 |
2011年 | 133篇 |
2010年 | 93篇 |
2009年 | 93篇 |
2008年 | 135篇 |
2007年 | 113篇 |
2006年 | 128篇 |
2005年 | 133篇 |
2004年 | 96篇 |
2003年 | 109篇 |
2002年 | 80篇 |
2001年 | 16篇 |
2000年 | 13篇 |
1999年 | 15篇 |
1998年 | 24篇 |
1997年 | 30篇 |
1996年 | 14篇 |
1995年 | 11篇 |
1994年 | 22篇 |
1993年 | 14篇 |
1992年 | 15篇 |
1991年 | 10篇 |
1990年 | 6篇 |
1989年 | 10篇 |
1988年 | 11篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 12篇 |
1984年 | 10篇 |
1983年 | 13篇 |
1982年 | 16篇 |
1981年 | 9篇 |
1980年 | 9篇 |
1979年 | 8篇 |
1978年 | 10篇 |
1976年 | 6篇 |
1974年 | 6篇 |
1973年 | 5篇 |
1943年 | 5篇 |
排序方式: 共有2418条查询结果,搜索用时 15 毫秒
101.
Liu W Hill D Gibbs AF Tempany M Howe C Borland R Morand M Kelly JW 《Melanoma research》2005,15(6):549-554
The ABCD(E) rule and the seven-point checklist are diagnostic aids that have proven to be useful in the hands of physicians; however, little is known of their value to patients with respect to aiding self-detection. The objective of this study was to investigate features that patients notice when identifying melanomas and to explore how well these features correspond to the ABCD(E) rule and the seven-point checklist. A retrospective, modified, case-control study involving patient interviews was performed. All interviews were conducted through the private consulting rooms of a Melbourne dermatologist (JWK) and a Newcastle plastic surgeon (CH) prior to the result of pathology being known to the patients and the interviewers. Sixty-seven patients with benign pigmented skin lesions and 46 patients with melanomas were included. Using a logistic regression model, the change in size/new lesion and change in colour (major criteria, seven-point checklist) were most useful in differentiating between melanomas and benign pigmented lesions in the hands of patients [odds ratio (OR), 4.74; 95% confidence interval (CI), 1.85-12.19; P=0.001; OR, 4.27; 95% CI, 1.62-11.26; P=0.003, respectively). The ABCD(E) rule failed to discriminate between melanoma and other benign pigmented skin lesions. It can be concluded that, of the patients' observations, changes in size or colour were most important in distinguishing between benign pigmented lesions and melanomas. Such features therefore deserve emphasis in public education campaigns. Medical professionals should also remember to seek a history of change in assessing pigmented skin lesions. 相似文献
102.
Johannes Levin Sylvia Maaß Madeleine Schuberth Gesine Respondek Friedemann Paul Ullrich Mansmann Wolfgang H. Oertel Stefan Lorenzl Florian Krismer Klaus Seppi Werner Poewe Gregor Wenning D. Berg Joseph Claßen Georg Ebersbach Karla Eggert Jan Kassubek Axel Lipp Matthias Löhle Brit Mollenhauer Alexander Münchau Martin Südmeyer C. Blankenstein C. Eberhardt B. Ertl-Wagner H. Heise I. Ricard The PROMESA study group Armin Giese Kai Bötzel Günter Höglinger 《Journal of neural transmission (Vienna, Austria : 1996)》2016,123(11):1357-1358
103.
104.
Paola Bianchi Elisa Fermo Kimberly Lezon-Geyda Eduard J. van Beers Holmes D. Morton Wilma Barcellini Bertil Glader Satheesh Chonat Yaddanapudi Ravindranath Peter E. Newburger Nina Kollmar Jenny M. Despotovic Madeleine Verhovsek Mukta Sharma Janet L. Kwiatkowski Kevin H. M. Kuo Marcin W. Wlodarski Hassan M. Yaish Susanne Holzhauer Heng Wang Joachim Kunz Kathryn Addonizio Hasan Al-Sayegh Wendy B. London Oliver Andres Richard van Wijk Patrick G. Gallagher Rachael F. F. Grace 《American journal of hematology》2020,95(5):472-482
Pyruvate kinase (PK) deficiency is a rare recessive congenital hemolytic anemia caused by mutations in the PKLR gene. This study reports the molecular features of 257 patients enrolled in the PKD Natural History Study. Of the 127 different pathogenic variants detected, 84 were missense and 43 non-missense, including 20 stop-gain, 11 affecting splicing, five large deletions, four in-frame indels, and three promoter variants. Within the 177 unrelated patients, 35 were homozygous and 142 compound heterozygous (77 for two missense, 48 for one missense and one non-missense, and 17 for two non-missense variants); the two most frequent mutations were p.R510Q in 23% and p.R486W in 9% of mutated alleles. Fifty-five (21%) patients were found to have at least one previously unreported variant with 45 newly described mutations. Patients with two non-missense mutations had lower hemoglobin levels, higher numbers of lifetime transfusions, and higher rates of complications including iron overload, extramedullary hematopoiesis, and pulmonary hypertension. Rare severe complications, including lower extremity ulcerations and hepatic failure, were seen more frequently in patients with non-missense mutations or with missense mutations characterized by severe protein instability. The PKLR genotype did not correlate with the frequency of complications in utero or in the newborn period. With ICCs ranging from 0.4 to 0.61, about the same degree of clinical similarity exists within siblings as it does between siblings, in terms of hemoglobin, total bilirubin, splenectomy status, and cholecystectomy status. Pregnancy outcomes were similar across genotypes in PK deficient women. This report confirms the wide genetic heterogeneity of PK deficiency. 相似文献
105.
106.
107.
108.
Trans Tasman Radiation Oncology Group Cancer Research: Phase III – Muscle Invasive Bladder Cancer trial (TROG 02.03): A moral dilemma 下载免费PDF全文
Nirdosh K Gogna FRCP FRANZCR Gillian Duchesne MD FRCR FRANZCR Peter O'Brien FRANZCR Nigel Spry FRCP FRANZCR PHD Sandra Turner FRANZCR John Matthews FRANZCR Martin Borg FRANZCR Kathryn Bauman B APP SC MED TECH Madeleine King PHD Elizabeth Burmeister MSC 《Journal of Medical Imaging and Radiation Oncology》2018,62(5):668-670
109.
Tilanus-Linthorst M Verhoog L Obdeijn IM Bartels K Menke-Pluymers M Eggermont A Klijn J Meijers-Heijboer H van der Kwast T Brekelmans C 《International journal of cancer. Journal international du cancer》2002,102(1):91-95
Female BRCA1/2 mutation carriers develop in up to 50% breast cancer (BC) before age 50 years. We investigated whether the specific histologic features of BRCA1/2-associated breast cancer influence imaging. We correlated the mammographic results with the histology of 34 BC in BRCA1/2 mutation carriers and 34 sporadic cancers in patients, matched for age and year of diagnosis. Mammography was significantly more frequently false-negative in carriers than controls (62% vs. 29% p = 0.01), despite comparable tumor size (mean solidus in circle 1.51 vs. 1.75) and breast density (high 41% vs. 53%). The image in carriers was significantly less as spiculated mass (6 vs. 18 p = 0.01). Cancers of BRCA1/2 mutation carriers had frequently higher mitotic counts (p < 0.0001) and prominent pushing margins around the tumor (p = 0.08) (p = 0.05 for 32 BRCA1). We also observed that prominent "pushing margins" correlated significantly with a false-negative mammography (p = 0.005) and with a mammographic image of a smooth, not a spiculated, mass (p = 0.01). False-negative mammography correlated independently with: BRCA1/2 mutation (p = 0.02), prominent pushing margins (p = 0.03) and high breast density (p = 0.01). MRI was carried out in 12 carriers, had 100% sensitivity and detected 5 cancers, still occult at physical examination and mammography. A BRCA1/2 mutation and high breast density at mammography contribute independently to false-negative mammography results. In mutation carriers any mammographic mass must be regarded with suspicion. Pushing margins of the tumor partly explain these results. For early BC detection in mutation carriers additional methods like MRI may be needed. This may not be necessary in other young women with breast symptoms. 相似文献
110.
Treatment of advanced thyroid cancer with axitinib: Phase 2 study with pharmacokinetic/pharmacodynamic and quality‐of‐life assessments 下载免费PDF全文
Laura D. Locati MD Lisa Licitra MD Laura Agate MD Sai‐Hong I. Ou MD PhD Andree Boucher MD Barbara Jarzab MD PhD Shukui Qin MD Madeleine A. Kane MD PhD Lori J. Wirth MD Connie Chen PharmD Sinil Kim MD Antonella Ingrosso ScD Yazdi K. Pithavala PhD Paul Bycott DrPH Ezra E. W. Cohen MD 《Cancer》2014,120(17):2694-2703