全文获取类型
收费全文 | 1153篇 |
免费 | 141篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 72篇 |
妇产科学 | 8篇 |
基础医学 | 183篇 |
口腔科学 | 3篇 |
临床医学 | 119篇 |
内科学 | 236篇 |
皮肤病学 | 13篇 |
神经病学 | 125篇 |
特种医学 | 7篇 |
外科学 | 182篇 |
综合类 | 65篇 |
一般理论 | 2篇 |
预防医学 | 136篇 |
眼科学 | 6篇 |
药学 | 100篇 |
肿瘤学 | 24篇 |
出版年
2019年 | 11篇 |
2018年 | 17篇 |
2015年 | 12篇 |
2014年 | 16篇 |
2013年 | 23篇 |
2012年 | 32篇 |
2011年 | 24篇 |
2010年 | 31篇 |
2009年 | 12篇 |
2008年 | 45篇 |
2007年 | 53篇 |
2006年 | 39篇 |
2005年 | 37篇 |
2004年 | 57篇 |
2003年 | 47篇 |
2002年 | 39篇 |
2001年 | 48篇 |
2000年 | 56篇 |
1999年 | 42篇 |
1998年 | 21篇 |
1997年 | 9篇 |
1996年 | 9篇 |
1995年 | 15篇 |
1994年 | 15篇 |
1993年 | 13篇 |
1992年 | 40篇 |
1991年 | 38篇 |
1990年 | 38篇 |
1989年 | 42篇 |
1988年 | 30篇 |
1987年 | 29篇 |
1986年 | 23篇 |
1985年 | 22篇 |
1984年 | 26篇 |
1983年 | 14篇 |
1982年 | 20篇 |
1981年 | 11篇 |
1980年 | 8篇 |
1979年 | 16篇 |
1978年 | 17篇 |
1977年 | 12篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1974年 | 10篇 |
1972年 | 10篇 |
1971年 | 11篇 |
1970年 | 9篇 |
1968年 | 18篇 |
1967年 | 9篇 |
1966年 | 10篇 |
排序方式: 共有1299条查询结果,搜索用时 15 毫秒
101.
102.
Background
The predictive validity of postgraduate examinations, such as MRCGP and MRCP(UK) in the UK, is hard to assess, particularly for clinically relevant outcomes. The sanctions imposed on doctors by the UK’s General Medical Council (GMC), including erasure from the Medical Register, are indicators of serious problems with fitness to practise (FtP) that threaten patient safety or wellbeing. This data linkage study combined data on GMC sanctions with data on postgraduate examination performance.Methods
Examination results were obtained for UK registered doctors taking the MRCGP Applied Knowledge Test (AKT; n?=?27,561) or Clinical Skills Assessment (CSA; n?=?17,365) at first attempt between 2010 and 2016 or taking MRCP(UK) Part 1 (MCQ; n?=?37,358), Part 2 (MCQ; n?=?28,285) or Practical Assessment of Clinical Examination Skills (PACES; n?=?27,040) at first attempt between 2001 and 2016. Exam data were linked with GMC actions on a doctor’s registration from September 2008 to January 2017, sanctions including Erasure, Suspension, Conditions on Practice, Undertakings or Warnings (ESCUW). Examination results were only considered at first attempts. Multiple logistic regression assessed the odds ratio for ESCUW in relation to examination results. Multiple imputation was used for structurally missing values.Results
Doctors sanctioned by the GMC performed substantially less well on MRCGP and MRCP(UK), with a mean Cohen’s d across the five exams of ??0.68. Doctors on the 2.5th percentile of exam performance were about 12 times more likely to have FtP problems than those on the 97.5th percentile. Knowledge assessments and clinical assessments were independent predictors of future sanctions, with clinical assessments predicting ESCUW significantly better. The log odds of an FtP sanction were linearly related to examination marks over the entire range of performance, additional performance increments lowering the risk of FtP sanctions at all performance levels.Conclusions
MRCGP and MRCP(UK) performance are valid predictors of professionally important outcomes that transcend simple knowledge or skills and the GMC puts under the headings of conduct and trust. Postgraduate examinations may predict FtP sanctions because the psychological processes involved in successfully studying, understanding and practising medicine at a high level share similar mechanisms to those underlying conduct and trust.103.
Identification of renal calculi by their Raman spectra. 总被引:1,自引:0,他引:1
K Sudlow A Woolf 《Clinica chimica acta; international journal of clinical chemistry》1991,203(2-3):387-393
104.
The purpose of this study was to compare the effectiveness of an interactive, multimedia CD-ROM with traditional methods of teaching the skill of performing a 12-lead ECG. A randomized pre/posttest experimental design was used. Seventy-seven baccalaureate nursing students in a required, senior-level critical-care course at a large midwestern university were recruited for the study. Two teaching methods were compared. The traditional method included a self-study module, a brief lecture and demonstration by an instructor, and hands-on experience using a plastic manikin and a real 12-lead ECG machine in the learning laboratory. The second method covered the same content using an interactive, multimedia CD-ROM embedded with virtual reality and supplemented with a self-study module. There were no significant (p < .05) baseline differences in pretest scores between the two groups and no significant differences by group in cognitive gains, student satisfaction with their learning method, or perception of self-efficacy in performing the skill. Overall results indicated that both groups were satisfied with their instructional method and were similar in their ability to demonstrate the skill correctly on a live, simulated patient. This evaluation study is a beginning step to assess new and potentially more cost-effective teaching methods and their effects on student learning outcomes and behaviors, including the transfer of skill acquisition via a computer simulation to a real patient. 相似文献
105.
Riccardo Coletta Neil A. Roberts Francesca Oltrabella Basem A. Khalil Antonino Morabito Adrian S. Woolf 《Journal of tissue engineering and regenerative medicine》2016,10(2):178-182
The ability to grow embryonic organs ex vivo provides an opportunity to follow their differentiation in a controlled environment, with resulting insights into normal development. Additionally, similar strategies can be used to assess effects on organogenesis of physical and chemical manipulations. This study aimed to create an organ culture model with which to test physical manipulations to enhance healing of gut segments, thus generating a single functional organ. Embryonic mouse jejunum was isolated and cut into 2–3 mm tubes, which were placed in pairs, separated by a small gap, on semi‐permeable supports. Each pair was linked by a nylon suture threaded through their lumens. After 3 days in organ culture fed by defined serum‐free media, the rudiments differentiated to form tubes of smooth muscle surrounding a core of rudimentary villi. Of 34 such pairs, 74% had touching and well aligned proximate ends. Of these joined structures, 80% (59% of the total pairs) had a continuous lumen, as assessed by observing the trajectories of fluorescent dextrans injected into their distal ends. Fused organ pairs formed a single functional unit, as assessed by spontaneous contraction waves propagated along their lengths. In these healed intestines, peripherin+ neurons formed a nexus in the zone of fusion, linking the rudiment pairs. In future, this system could be used to test whether growth factors enhance fusion. Such results should in turn inform the design of novel treatments for short bowel syndrome, a potentially fatal condition with a currently limited and imperfect range of therapies. ©2015. The Authors Journal of Tissue Engineering and Regenerative Medicine Published by John Wiley & Sons, Ltd 相似文献
106.
107.
Sànchez-Riera L Wilson N Kamalaraj N Nolla JM Kok C Li Y Macara M Norman R Chen JS Smith EU Sambrook PN Hernández CS Woolf A March L 《Best Practice & Research: Clinical Rheumatology》2010,24(6):793-810
The prevalence of osteoporosis is expected to increase with the ageing of the world's population. This article reviews the epidemiology, risk factors and health burden of osteoporosis. In the Global Burden of Disease (GBD) Study 2005, osteoporosis is studied as a risk factor for fracture by considering the bone-mineral-density (BMD) measurement as the continuous exposure variable. We have performed a systematic review seeking population-based studies with BMD data measured by dual-X-ray absorptiometry (DXA). The femoral neck was selected as the unique location and all values were converted into Hologic(?) to enable inclusion of worldwide data for analysis. Provisional results on mean BMD values for different world regions are shown in age breakdowns for males and females 50 years or over, as well as mean T-scores using the young, white, female reference of National Health and Nutrition Examination Survey (NHANES) III. Results show remarkable geographical differences and a time trend towards improvement of the BMD values in Asian and European populations. 相似文献
108.
Shazia Adalat Adrian S. Woolf Karen A. Johnstone Andrea Wirsing Lorna W. Harries David A. Long Raoul C. Hennekam Sarah E. Ledermann Lesley Rees William van't Hoff Stephen D. Marks Richard S. Trompeter Kjell Tullus Paul J. Winyard Janette Cansick Imran Mushtaq Harjeeta K. Dhillon Coralie Bingham Emma L. Edghill Rukshana Shroff Horia Stanescu Gerhart U. Ryffel Sian Ellard Detlef Bockenhauer 《Journal of the American Society of Nephrology : JASN》2009,20(5):1123-1131
109.
Woolf AD 《Current opinion in rheumatology》2007,19(4):370-375
PURPOSE OF REVIEW: Glucocorticoids are widely used, often long term, and a major side effect is osteoporosis and increased risk of fracture. This review considers how common is the problem, the patients who are most at risk, our current understanding of mechanisms, and how to prevent and effectively treat glucocorticoid-induced osteoporosis. The actions currently being undertaken in clinical practice are reviewed. RECENT FINDINGS: Glucocorticoid-induced osteoporosis is an increasing problem that occurs not only in those on high-dose therapy. Advances in our knowledge of the cellular and cytokine mechanisms of bone turnover and glucocorticoid mechanisms of action are leading to a better understanding of how glucocorticoids affect bone cells and novel ways of prevention. Although there are effective treatments to prevent and control glucocorticoid-induced osteoporosis as well as guidelines for their use, they are still not being applied in routine clinical practice. SUMMARY: Glucocorticoid-induced osteoporosis is a significant problem. Although our understanding of effective prevention and treatment strategies is improving, there needs to be better implementation of these strategies. 相似文献
110.
Walsh NE Brooks P Hazes JM Walsh RM Dreinhöfer K Woolf AD Akesson K Lidgren L;Bone Joint Decade Task Force for Standards of Care for Acute Chronic Musculoskeletal Pain 《Archives of physical medicine and rehabilitation》2008,89(9):1830-1845
Walsh NE, Brooks P, Hazes JM, Walsh RM, Dreinhöfer K, Woolf AD, Åkesson K, Lidgren L, for the Bone and Joint Decade Task Force for Standards of Care for Acute and Chronic Musculoskeletal Pain. Standards of care for acute and chronic musculoskeletal pain: the Bone and Joint Decade (2000−2010).Musculoskeletal conditions often manifest with the onset of pain and the resulting physical limitations. Musculoskeletal pain is almost inevitable in an individual's lifetime. It is one of the most common reasons for self-medication and entry into the health care system. Musculoskeletal pain affects 1 in 4 adults and is the most common source of serious long-term pain and physical disability. The monumental impact of musculoskeletal conditions is now recognized by the United Nations, the World Health Organization, World Bank, and numerous governments throughout the world through support of the Bone and Joint Decade 2000 to 2010 initiative. Individuals with musculoskeletal pain concerns are regularly ignored, their complaints often misunderstood by health care providers, and accordingly they do not receive timely or effective treatment. The standards of care in this document are designed to provide generic guidelines for appropriate care of people with acute or chronic musculoskeletal pain. This document was developed over a 4-year period using multiple international meetings and a Task Force of the Bone and Joint Decade for developing international standards for the care of acute and chronic musculoskeletal pain. The final document is a product of the World Health Organization Collaborating Centre for Evidence-Based Health Care in Musculoskeletal Disorders. 相似文献