全文获取类型
收费全文 | 4559篇 |
免费 | 364篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 24篇 |
儿科学 | 132篇 |
妇产科学 | 85篇 |
基础医学 | 576篇 |
口腔科学 | 149篇 |
临床医学 | 417篇 |
内科学 | 1011篇 |
皮肤病学 | 75篇 |
神经病学 | 269篇 |
特种医学 | 110篇 |
外科学 | 754篇 |
综合类 | 250篇 |
一般理论 | 5篇 |
预防医学 | 370篇 |
眼科学 | 151篇 |
药学 | 283篇 |
中国医学 | 9篇 |
肿瘤学 | 278篇 |
出版年
2023年 | 40篇 |
2022年 | 29篇 |
2021年 | 145篇 |
2020年 | 109篇 |
2019年 | 132篇 |
2018年 | 133篇 |
2017年 | 111篇 |
2016年 | 120篇 |
2015年 | 114篇 |
2014年 | 144篇 |
2013年 | 177篇 |
2012年 | 310篇 |
2011年 | 284篇 |
2010年 | 154篇 |
2009年 | 155篇 |
2008年 | 213篇 |
2007年 | 232篇 |
2006年 | 224篇 |
2005年 | 218篇 |
2004年 | 182篇 |
2003年 | 182篇 |
2002年 | 164篇 |
2001年 | 136篇 |
2000年 | 148篇 |
1999年 | 117篇 |
1998年 | 58篇 |
1997年 | 35篇 |
1996年 | 28篇 |
1995年 | 42篇 |
1994年 | 28篇 |
1993年 | 23篇 |
1992年 | 55篇 |
1991年 | 59篇 |
1990年 | 69篇 |
1989年 | 61篇 |
1988年 | 44篇 |
1987年 | 49篇 |
1986年 | 44篇 |
1985年 | 36篇 |
1984年 | 29篇 |
1983年 | 25篇 |
1982年 | 32篇 |
1981年 | 27篇 |
1980年 | 26篇 |
1979年 | 30篇 |
1978年 | 23篇 |
1977年 | 23篇 |
1976年 | 22篇 |
1975年 | 20篇 |
1973年 | 19篇 |
排序方式: 共有4948条查询结果,搜索用时 15 毫秒
1.
Lee Wan Ning Ong Chon Phin Khamis Alaa Sadiq M. Singaram Nallammai Lee Sau Har 《Zeitschrift fur Gesundheitswissenschaften》2022,30(7):1733-1743
Journal of Public Health - The prevalence of breast cancer cases in Malaysia is 1 in every 20 women. Comprehending the risk factors and causation of breast cancer as well as enabling early... 相似文献
2.
3.
Arthur L. Malkani Kevin J. Himschoot Kevin L. Ong Edmund C. Lau Doruk Baykal John R. Dimar Steven D. Glassman Daniel J. Berry 《The Journal of arthroplasty》2019,34(5):907-911
Background
Patients undergoing primary total hip arthroplasty (THA) following lumbar spine fusion have an increased incidence of dislocation compared to those without prior lumbar fusion. The purpose of this study is to determine if timing of THA prior to or after lumbar fusion would have an effect on dislocation and revision incidence in patients with both hip and lumbar spine pathology.Methods
One hundred percent Medicare inpatient claims data from 2005 to 2015 were used to compare dislocation and revision risks in patients with primary THA with pre-existing lumbar spine fusion vs THA with subsequent lumbar spine fusion within 1, 2, and 5 years after the index THA. A total of 42,300 patients met inclusion criteria, 28,668 patients of which underwent THA with pre-existing lumbar spinal fusion (LSF) and 13,632 patients who had prior THA and subsequent LSF. Patients who had THA first followed by LSF were further stratified based on the interval between index THA and subsequent LSF (1, 2, and 5 years), making 4 total groups for comparison. Multivariate cox regression analysis was performed adjusting for age, socioeconomic status, race, census region, gender, Charlson score, pre-existing conditions, discharge status, length of stay, and hospital characteristics.Results
Patients with prior LSF undergoing THA had a 106% increased risk of dislocation compared to those with LSF done 5 years after THA (P < .001). Risk of revision THA was greater in the pre-existing LSF group by 43%, 41%, and 49% at 1, 2, and 5 years post THA compared to the groups with THA done first with subsequent LSF. Dislocation was the most common etiology for revision THA in all groups, but significantly higher in the prior LSF group (26.6%).Conclusion
Results of this study demonstrate that sequence of surgical intervention for concomitant lumbar and hip pathology requiring LSF and THA respectively significantly impacts the fate of the THA performed. Patients with prior LSF undergoing THA are at significantly higher risk of dislocation and subsequent revision compared to those with THA first followed by delayed LSF.Level of Evidence
3. 相似文献4.
Daniel Poremski Mark Alexander Tina Fang Giles Ming‐Yee Tan Samantha Ong Alex Su Daniel Fung Hong Choon Chua 《Asia-Pacific psychiatry》2020,12(1)
People with mental illness may be unable to provide critical input about the care they wish to receive during a psychiatric crisis because of altered mental states. It is therefore imperative that clinicians seek to understand service users' wishes for care while they are well and able to provide meaningful input into the discussion. Achieving such an end may be done by discussing and completing a psychiatric advance directive. However, very few Asian countries have legislation that supports such advance directives. The present article seeks to give physicians more information about advance psychiatric directives and the potential role they could play to improve the healthcare provided in Asia to people at risk of losing capacity due to a mental illness. The degree to which mental health legislation supports psychiatric advance directives is documented for each country of South East Asia and Eastern Asia. 相似文献
5.
Ten‐day triple therapy versus sequential therapy versus concomitant therapy as first‐line treatment for Helicobacter pylori infection 下载免费PDF全文
6.
P.G.M. Knoops A. Borghi R.W.F. Breakey J. Ong N.U.O. Jeelani R. Bruun S. Schievano D.J. Dunaway B.L. Padwa 《International journal of oral and maxillofacial surgery》2019,48(4):511-518
Three-dimensional surgical planning is used widely in orthognathic surgery. Although numerous computer programs exist, the accuracy of soft tissue prediction remains uncertain. The purpose of this study was to compare the prediction accuracy of Dolphin, ProPlan CMF, and a probabilistic finite element method (PFEM). Seven patients (mean age 18 years; five female) who had undergone Le Fort I osteotomy with preoperative and 1-year postoperative cone beam computed tomography (CBCT) were included. The three programs were used for soft tissue prediction using planned and postoperative maxillary position, and these were compared to postoperative CBCT. Accurate predictions were obtained with each program, indicated by root mean square distances: RMSDolphin = 1.8 ± 0.8 mm, RMSProPlan = 1.2 ± 0.4 mm, and RMSPFEM = 1.3 ± 0.4 mm. Dolphin utilizes a landmark-based algorithm allowing for patient-specific bone-to-soft tissue ratios, which works well for cephalometric radiographs but has limited three-dimensional accuracy, whilst ProPlan and PFEM provide better three-dimensional predictions with continuous displacements. Patient or population-specific material properties can be defined in PFEM, while no soft tissue parameters are adjustable in ProPlan. Important clinical considerations are the topological differences between predictions due to the three algorithms, the non-negligible influence of the mismatch between planned and postoperative maxillary position, and the learning curve associated with sophisticated programs like PFEM. 相似文献
7.
8.
9.
10.