全文获取类型
收费全文 | 320篇 |
免费 | 15篇 |
国内免费 | 1篇 |
专业分类
儿科学 | 14篇 |
妇产科学 | 3篇 |
基础医学 | 6篇 |
临床医学 | 90篇 |
内科学 | 33篇 |
神经病学 | 10篇 |
特种医学 | 8篇 |
外科学 | 5篇 |
综合类 | 33篇 |
预防医学 | 91篇 |
眼科学 | 1篇 |
药学 | 23篇 |
中国医学 | 19篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 10篇 |
2018年 | 4篇 |
2017年 | 15篇 |
2016年 | 14篇 |
2015年 | 20篇 |
2014年 | 23篇 |
2013年 | 8篇 |
2012年 | 16篇 |
2011年 | 34篇 |
2010年 | 33篇 |
2009年 | 25篇 |
2008年 | 29篇 |
2007年 | 17篇 |
2006年 | 12篇 |
2005年 | 5篇 |
2004年 | 9篇 |
2003年 | 5篇 |
2002年 | 10篇 |
2001年 | 3篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1980年 | 2篇 |
排序方式: 共有336条查询结果,搜索用时 15 毫秒
1.
2.
Golo Petzold Melissa Porsche Volker Ellenrieder Steffen Kunsch Albrecht Neesse 《Ultrasound in medicine & biology》2019,45(2):402-410
The aim was to evaluate the influence of food intake on liver stiffness measurement (LSM), performed with 2-D shear wave elastography (Logiq E9, GE Medical Systems, Wauwatosa, WI, USA). One hundred healthy volunteers were prospectively enrolled. Mean age was 25.8 (19–55) y, and mean body mass index was 22.43 (17.3–30.8) kg/m². Patients fasted for at least 3 h and subsequently ingested a liquid meal of 800 kcal. Liver stiffness and portal vein velocity were measured before and after food intake. Food intake resulted in significantly higher LSM values compared with baseline LSM (5.74 ± 0.94 kPa vs. 4.80 ± 0.94 kPa, p < 0.001). On multiple linear regression analysis, body mass index was significantly positively correlated with the LSM increase after food intake (p?=?0.01). No correlation between the increase in LSM and the increase in post-prandial portal vein velocity was observed (r?=?0.09). In summary, food intake has a significant influence on LSM. There is an 11% risk of misclassifying non-fasting, healthy patients as having significant fibrosis. 相似文献
3.
4.
5.
《Vaccine》2015,33(3):479-486
We examined completion and compliance rates of rotavirus (RV) vaccination according to the recommendations of the Advisory Committee on Immunization Practices (ACIP) and the Food and Drug Administration approved Prescribing Information (PI) for Rotarix® (RV1, GlaxoSmithKline Vaccines) and RotaTeq® (RV5, Merck and Co.) among infants under one year of age covered by Medicaid programs. Healthcare claims data from state Medicaid programs that constituted the Truven Health MarketScan® Multi-State Medicaid Database were retrieved from May 2008–June 2012. Infants were grouped under PI and ACIP cohorts based on the dosing regimens followed. The overall compliance per PI (n = 673,956) and ACIP (n = 695,612) recommendations were 24.5% and 28.2%, respectively; completion rates were 30.3% and 32.6%, respectively. In the PI cohort, infants who received RV1 had significantly higher compliance as compared with infants who received RV5 (65.2% vs. 31.3%; p < 0.0001); completion rates among infants receiving RV1 and RV5 were 65.3% and 46.4%, respectively (p < 0.0001). In the ACIP cohort, compliance with RV1 was significantly higher than RV5 (68.8% vs. 45.9%; p < 0.0001) as was the overall completion rate (73.5% vs. 48.8%; p < 0.0001). While compliance is increasing year over year, overall compliance of RV vaccines is suboptimal, with over 40% of eligible infants unvaccinated in both populations. The 2-dose RV vaccine showed better completion rates and higher compliance than the 3-dose RV vaccine in the United States. Public health initiatives focusing on suboptimal compliance and completion rates of RV vaccination in the Medicaid population could improve these metrics, thereby offering protection against RV infection. 相似文献
6.
《Vaccine》2015,33(32):3795-3800
IntroductionDiarrhea is one of the leading causes of death in children under 5, and an estimated 39% of these deaths are attributable to rotavirus. Currently two live, oral rotavirus vaccines have been introduced on the market; however, the herd immunity effect associated with rotavirus vaccine has not yet been quantified. The purpose of this meta-analysis was to estimate the herd immunity effects associated with rotavirus vaccines.MethodsWe performed a systematic literature review of articles published between 2008 and 2014 that measured the impact of rotavirus vaccine on severe gastroenteritis (GE) morbidity or mortality. We assessed the quality of published studies using a standard protocol and conducted meta-analyses to estimate the herd immunity effect in children less than one year of age across all years presented in the studies. We conducted these analyses separately for studies reporting a rotavirus-specific GE outcome and those reporting an all-cause GE outcome.ResultsIn studies reporting a rotavirus-specific GE outcome, four of five of which were conducted in the United States, the median herd effect across all study years was 22% [19–25%]. In studies reporting an all-cause GE outcome, all of which were conducted in Latin America, the median herd effect was 24.9% [11–30%].ConclusionsThere is evidence that rotavirus vaccination confers a herd immunity effect in children under one year of age in the United States and Latin American countries. Given the high variability in vaccine efficacy across regions, more studies are needed to better examine herd immunity effects in high mortality regions. 相似文献
7.
目的 探讨细胞色素P450(CYP)2C19基因单核苷酸多态性与冠心病患者经皮冠状动脉介入治疗(PCI)术后长期服用氯吡格雷临床预后的关系.方法 前瞻性入选2013年1月至2014年6月住院治疗并PCI的冠心病患者150例.均接受双联抗血小板治疗,于服药前和PCI术后检测血小板聚集率,根据检测结果分为氯吡格雷抵抗组(CR)和非氯吡格雷抵抗组(NCR).并测定CYP2C19基因单核苷酸多态类型.CR组经临床对策干预后与NCR组对比,观察两组患者术后1年心绞痛复发、出血等情况的发生.结果 约有24.67%的冠心病患者采用氯吡格雷治疗后血小板聚集率不能达标;通过关联分析,发现CYP2C19*2携带者血小板聚集率显著较高;综合分析发现CYP2C19 * 2、长期吸烟、血小板计数增高及糖尿病为血小板聚集率不能达标的独立危险因素;CR组经临床对策干预后与NCR组主要终点、次要终点及出血事件差异无统计学意义.结论 CYP2C19 *2、长期吸烟、血小板计数增高及糖尿病为血小板聚集率不能达标的独立危险因素.氯吡格雷抵抗患者,经临床对策干预强化抗血小板治疗可改善冠心病患者PCI术后血小板高反应性状态等,且不增加出血风险. 相似文献
8.
先天性马蹄内翻足(congenital talipes equinovarus,CTEV)是儿童最常见的骨骼肌肉出生缺陷畸形之一,临床特征包括跟骨内翻、前足内收、高弓足和后足跖屈畸形。目前CTEV的发病机制仍不清楚,不同的学说包括:神经细胞损伤、肌肉异常、血管缺陷、子宫内限制、遗传因素、特发性先天性畸形、基因-环境的相互作用、骨骼发育不良、细胞外基质异常、分子转运和代谢异常等。遗传因素对于CTEV的致病起着重要作用,但尚未发现主要的致病基因。普遍认为CTEV是环境因素和遗传因素共同作用的结果。现对CTEV致病基因的研究进展做一综述。 相似文献
9.
10.