全文获取类型
收费全文 | 7561篇 |
免费 | 560篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 100篇 |
儿科学 | 252篇 |
妇产科学 | 164篇 |
基础医学 | 910篇 |
口腔科学 | 75篇 |
临床医学 | 1010篇 |
内科学 | 1350篇 |
皮肤病学 | 112篇 |
神经病学 | 724篇 |
特种医学 | 183篇 |
外科学 | 812篇 |
综合类 | 75篇 |
一般理论 | 3篇 |
预防医学 | 1096篇 |
眼科学 | 217篇 |
药学 | 483篇 |
中国医学 | 5篇 |
肿瘤学 | 565篇 |
出版年
2024年 | 8篇 |
2023年 | 71篇 |
2022年 | 137篇 |
2021年 | 268篇 |
2020年 | 170篇 |
2019年 | 202篇 |
2018年 | 262篇 |
2017年 | 205篇 |
2016年 | 197篇 |
2015年 | 236篇 |
2014年 | 314篇 |
2013年 | 441篇 |
2012年 | 622篇 |
2011年 | 655篇 |
2010年 | 365篇 |
2009年 | 322篇 |
2008年 | 500篇 |
2007年 | 481篇 |
2006年 | 442篇 |
2005年 | 479篇 |
2004年 | 423篇 |
2003年 | 376篇 |
2002年 | 326篇 |
2001年 | 53篇 |
2000年 | 40篇 |
1999年 | 44篇 |
1998年 | 44篇 |
1997年 | 53篇 |
1996年 | 28篇 |
1995年 | 23篇 |
1994年 | 16篇 |
1993年 | 8篇 |
1992年 | 18篇 |
1991年 | 20篇 |
1990年 | 18篇 |
1989年 | 11篇 |
1988年 | 17篇 |
1987年 | 8篇 |
1986年 | 24篇 |
1985年 | 18篇 |
1984年 | 16篇 |
1983年 | 24篇 |
1982年 | 16篇 |
1981年 | 14篇 |
1980年 | 10篇 |
1979年 | 15篇 |
1978年 | 10篇 |
1976年 | 10篇 |
1975年 | 9篇 |
1970年 | 11篇 |
排序方式: 共有8136条查询结果,搜索用时 15 毫秒
241.
Dana Zelnik Yovel Orna Tal Dror Dicker Avishay Elis Micha Rapoport 《Israel journal of health policy research》2018,7(1):73
Background
Professional skills and academic records of the highest degree are essential requirements for the chairmanship of internal medicine departments. Whether the new generation and future successors of Israeli chairmen is endowed with these attributes is not known.Purpose
To determine whether there is a lack of future suitable successors for the current heads of internal medicine departments in Israel and to compare the demographic, academic and professional characteristics of the older and newer generations of department heads.Methods
An online anonymous questionnaire was nationally distributed during 2016 to all active heads of internal medicine departments in Israel (n?=?101). First round was followed by two runs of personal phone calls to promote participation.Results
Sixty-seven (67%) of chairmen responded. The vast majority of current chairs of internal medicine departments are males (N?=?59, 88%) over 50 years of age (N?=?58, 86%) with established academic background with lecturer degree or higher (N?=?57, 85%).Only 19 (28%) of current heads assigned a future successor. Comparison of chairmen who did and did not assigned successors demonstrated that assignment of successors was associated with higher academic status (P?<?0.02) and longer chairmanship (p?<?0.01) but not with mean age of current chairmen (p?<?0.08). Nevertheless, most assignments (55%) were done by chairmen in the 61 to 67 years age group. As compared to current chairmen, the designated successors have lesser academic status (p?<?0.01) and are characterized by a higher female prevalence (P?<?0.03).Conclusions
Significant demographic, professional and academic differences exist between the current chairs of internal medicine departments in Israeli hospitals and their future successors. This underscores the need for reassessment of the availability and requirements of this crucial position.242.
243.
Allison Given Chunyk Alison Joyce Saloumeh K. Fischer Mark Dysinger Alvydas Mikulskis Andreas Jeromin Rosemary Lawrence-Henderson Dana Baker David Yeung 《The AAPS journal》2018,20(1):10
An in-depth evaluation of the Quanterix© Simoa? platform was undertaken by scientists from the AAPS Emerging Technologies Focus Group to determine the overall performance of the technology as well as provide guidance to future users. In order to test the platform in a non-GLP bioanalytical setting, a cross-site evaluation of the Quanterix IL-6 biomarker kit was performed. Parameters tested during this evaluation included sensitivity, accuracy and precision, and parallelism in human serum from normal individuals. The results demonstrated improved sensitivity compared to the claimed sensitivity of other commercially available IL-6 kits and showed excellent site-to-site reproducibility. Observed issues included difficulties with system reliability and a lack of parallelism and specificity in a subset of samples. Overall, these results demonstrate that while there are challenges to the Simoa platform this technology offers automation capabilities and excellent sensitivity that enhance bioanalysis especially of low-abundance analytes. 相似文献
244.
245.
Elise Davis Dana Young Kim-Michelle Gilson Elena Swift Jeffrey Chan Lisa Gibbs Utsana Tonmukayakul Dinah Reddihough Katrina Williams 《Value in health》2018,21(12):1419-1427
Background
This paper identifies the best instruments for service providers to measure the quality of life (QoL) of children with a disability, with a focus on their alignment with the Convention on the Rights of Persons with a Disability (CRPD).Methods
This study reviewed systematic reviews to identify generic QoL instruments for children and adolescents, followed by an appraisal process using newly developed criteria. QoL instruments with a health status, functioning, and condition-specific focus were excluded.Results
Twenty generic QoL instruments for children were identified from existing systematic reviews to undergo further review. Only 2 of the 20 instruments were recommended for service providers to measure the QoL of children with a disability (KIDSCREEN and KINDL). Many pediatric QoL instruments (N = 9) focus on functioning and are not consistent with the CRPD, confounding a child’s functioning with their feelings about their life. KIDSCREEN and KINDL have self-report and parent report versions, are applicable for childhood and adolescence, demonstrate adequate reliability and validity, involved children in their development, focus on wellbeing, are likely to be able to be completed by a child with a disability, and are low in cost.Conclusions
Many instruments focus on functioning rather than wellbeing and thus may not capture the QoL of children with a disability. A child’s functional limitations may not be consistent with their feelings about life. Two instruments that assess wellbeing and meet the criteria important for service providers now require further testing to explore their usefulness and validity for children with varying abilities. 相似文献246.
247.
248.
BACKGROUND: Although public reporting of hospital and physician performance is a cornerstone of the effort to improve health care quality, the optimal approach to risk adjustment is unknown. OBJECTIVE: We sought to assess hospital quality using a matching algorithm based on a generalized distance metric and to compare this approach to the more traditional regression-based approach. DESIGN/ DATA SOURCE: This was a retrospective study using the New York State (NYS) Coronary Artery Bypass Surgery Reporting System (CSRS), focusing on all patients undergoing isolated CABG surgery in NYS who were discharged in 1999 (18,116 patients). Patients from specific hospital were matched to a control group using the Mahalanobis distance. The hospitals' expected mortality rate was calculated in 2 ways: (1) as the mortality rate of the control group or (2) as the mortality rate predicted by the NYS CABG model. Hospitals whose observed mortality rate was significantly different from their expected mortality rate (OE difference) were defined as quality outliers. RESULTS: The 2 risk-adjustment methodologies disagreed on the outlier status of 4 of the 33 hospitals. Kappa analysis demonstrated substantial agreement between these 2 methods for identifying quality outliers: kappa = 0.61. There was excellent agreement between the point estimates of the OE difference obtained using these 2 risk adjustment methodologies. CONCLUSION: Basing outcome assessment on either matching or regression modeling yielded similar findings on hospital ranking but only moderate level of agreement on hospital quality. The use of matching may enhance the transparency and acceptance of outcome report cards by hospitals and physicians. 相似文献
249.
250.
Heyer Jessica H. Perim Dana A. Amdur Richard L. Pandarinath Rajeev 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2020,30(2):329-336
European Journal of Orthopaedic Surgery & Traumatology - The purpose of this study is to evaluate any association between preoperative smoking and perioperative and early postoperative... 相似文献