全文获取类型
收费全文 | 3066篇 |
免费 | 228篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 64篇 |
妇产科学 | 46篇 |
基础医学 | 553篇 |
口腔科学 | 103篇 |
临床医学 | 280篇 |
内科学 | 844篇 |
皮肤病学 | 27篇 |
神经病学 | 279篇 |
特种医学 | 78篇 |
外科学 | 331篇 |
综合类 | 34篇 |
一般理论 | 3篇 |
预防医学 | 224篇 |
眼科学 | 53篇 |
药学 | 193篇 |
中国医学 | 8篇 |
肿瘤学 | 157篇 |
出版年
2023年 | 16篇 |
2022年 | 45篇 |
2021年 | 94篇 |
2020年 | 43篇 |
2019年 | 81篇 |
2018年 | 80篇 |
2017年 | 62篇 |
2016年 | 79篇 |
2015年 | 90篇 |
2014年 | 102篇 |
2013年 | 174篇 |
2012年 | 229篇 |
2011年 | 246篇 |
2010年 | 114篇 |
2009年 | 122篇 |
2008年 | 165篇 |
2007年 | 160篇 |
2006年 | 137篇 |
2005年 | 152篇 |
2004年 | 127篇 |
2003年 | 108篇 |
2002年 | 89篇 |
2001年 | 66篇 |
2000年 | 56篇 |
1999年 | 53篇 |
1998年 | 30篇 |
1997年 | 29篇 |
1996年 | 15篇 |
1995年 | 17篇 |
1994年 | 21篇 |
1993年 | 13篇 |
1992年 | 49篇 |
1991年 | 42篇 |
1990年 | 34篇 |
1989年 | 33篇 |
1988年 | 38篇 |
1987年 | 21篇 |
1986年 | 19篇 |
1985年 | 23篇 |
1984年 | 21篇 |
1979年 | 14篇 |
1978年 | 19篇 |
1977年 | 11篇 |
1976年 | 16篇 |
1975年 | 14篇 |
1974年 | 14篇 |
1973年 | 11篇 |
1971年 | 13篇 |
1969年 | 12篇 |
1967年 | 10篇 |
排序方式: 共有3299条查询结果,搜索用时 15 毫秒
41.
42.
Heather Shaw Bonilha Kate Humphries Julie Blair Elizabeth G. Hill Katlyn McGrattan Brittni Carnes Walter Huda Bonnie Martin-Harris 《Dysphagia》2013,28(1):77-85
Guidelines and preventive measures have been established to limit radiation exposure time during modified barium swallow studies (MBSS) but multiple variables may influence the duration of the exam. This study examined the influence of clinician experience, medical diagnosis category, swallowing impairment severity, and use of a standardized protocol on fluoroscopy time. A retrospective review of 739 MBSSs performed on 612 patients (342 males/270 females; age range = 18–96 years) completed in 1 year at the Medical University of South Carolina was performed with IRB approval. All studies were completed by speech-language pathologists trained in the data collection protocol, interpretation, and scoring of the MBSImP?©. Medical diagnosis category, swallowing impairment severity (MBSImP?© score), clinician experience, and fluoroscopy time were the variables recorded for analysis. Fluoroscopy time was not significantly associated with medical diagnosis category (p = 0.10). The severity of the MBSImP?© Oral Total and Pharyngeal Total resulted in statistically significant increases in fluoroscopy time (p < 0.05). Studies by novice clinicians had longer exposure times when compared to those of experienced clinicians (p = 0.037). Average radiation exposure time using the MBSImP?© approach was 2.9 min, with a 95 % confidence interval of 2.8–3.0 min, which was well within the range of exposure times reported in the literature. This study provides preliminary information regarding the impact of medical diagnosis category, swallowing impairment severity, and clinician experience on fluoroscopy time. These findings also suggest that a thorough, standardized protocol for MBSSs did not cause unnecessary radiation exposure time during the MBSS. 相似文献
43.
44.
IL‐33 polymorphisms are associated with increased risk of hay fever and reduced regulatory T cells in a birth cohort
下载免费PDF全文
![点击此处可从《Pediatric allergy and immunology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Paul C. Schröder Vera I. Casaca Sabina Illi Maximilian Schieck Sven Michel Andreas Böck Caroline Roduit Remo Frei Anna Lluis Jon Genuneit Petra Pfefferle Marjut Roponen Juliane Weber Charlotte Braun‐Fahrländer Josef Riedler Roger Lauener Dominique Angèle Vuitton Jean‐Charles Dalphin Juha Pekkanen Erika von Mutius Michael Kabesch Bianca Schaub PASTURE Study group 《Pediatric allergy and immunology》2016,27(7):687-695
45.
46.
Evgeny Sidorov Courtney Iser Nidhi Kapoor Bappaditya Ray Juliane Chainakul Chao Xu Andrei V. Alexandrov David Lee Gordon 《Journal of stroke and cerebrovascular diseases》2021,30(8):105890
ObjectivesIntravenous (IV) tissue plasminogen activator (tPA) should be given to patients with acute ischemic stroke (AIS) and avoided in stroke mimics (SM). Select use of emergency brain magnetic resonance imaging (eMRI-brain) in stroke-alerts aids diagnosis, but accepted utilization criteria for eMRI-brain do not currently exist. We developed criteria for eMRI-brain and report the yield of eMRI-brain in stroke-alert patients.Materials and MethodsWe developed three history-based criteria for performing eMRI-brain during stroke-alerts: (1) history of previous similar deficits, (2) change in consciousness at onset of symptoms, (3) symptom presentation consistent with migraine aura. We then performed a retrospective chart review of patients who presented as a stroke-alert over a 5-year period and determined how these criteria affected administration of IV tPA to AIS and SM patients.ResultsAmong 3,512 stroke-alerts, 230 (8.1%) patients met our criteria for eMRI-brain exams: 217 (92.6%) had SM and 17 (7.4%) had AIS. Our IV tPA decision-making analysis showed that based on eMRI-brain IV tPA was less frequently administered to SM patients (PCC-0.841, p=0.036) with less failures to administer IV tPA to patients with AIS (PCC -0.907, p-value=0.013, Pearson correlation coefficient). No patients became ineligible for IV tPA due to MRI-related time delays.ConclusionsOur history based criteria for performing eMRI-brain during stroke-alerts show a high yield of stroke mimics. Selective eMRI-brain improves decision-making accuracy regarding IV tPA administration. 相似文献
47.
48.
Renner Ilona Scharmanski Sara van Staa Juliane Neumann Anna Paul Mechthild 《Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz》2018,61(10):1225-1235
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Frühe Hilfen sind Angebote für Familien mit Kindern bis zum Alter von 3 Jahren. Sie leisten einen Beitrag zur... 相似文献
49.
50.