全文获取类型
收费全文 | 10209篇 |
免费 | 500篇 |
国内免费 | 57篇 |
专业分类
耳鼻咽喉 | 211篇 |
儿科学 | 562篇 |
妇产科学 | 335篇 |
基础医学 | 985篇 |
口腔科学 | 278篇 |
临床医学 | 860篇 |
内科学 | 2236篇 |
皮肤病学 | 172篇 |
神经病学 | 678篇 |
特种医学 | 386篇 |
外科学 | 2015篇 |
综合类 | 203篇 |
一般理论 | 2篇 |
预防医学 | 396篇 |
眼科学 | 273篇 |
药学 | 537篇 |
中国医学 | 37篇 |
肿瘤学 | 600篇 |
出版年
2023年 | 87篇 |
2022年 | 237篇 |
2021年 | 355篇 |
2020年 | 226篇 |
2019年 | 262篇 |
2018年 | 316篇 |
2017年 | 216篇 |
2016年 | 298篇 |
2015年 | 316篇 |
2014年 | 446篇 |
2013年 | 626篇 |
2012年 | 794篇 |
2011年 | 777篇 |
2010年 | 458篇 |
2009年 | 396篇 |
2008年 | 658篇 |
2007年 | 698篇 |
2006年 | 654篇 |
2005年 | 613篇 |
2004年 | 531篇 |
2003年 | 433篇 |
2002年 | 373篇 |
2001年 | 129篇 |
2000年 | 97篇 |
1999年 | 83篇 |
1998年 | 46篇 |
1997年 | 27篇 |
1996年 | 34篇 |
1995年 | 41篇 |
1994年 | 35篇 |
1993年 | 34篇 |
1992年 | 47篇 |
1991年 | 54篇 |
1990年 | 33篇 |
1989年 | 49篇 |
1988年 | 31篇 |
1987年 | 21篇 |
1986年 | 29篇 |
1985年 | 24篇 |
1984年 | 19篇 |
1983年 | 17篇 |
1982年 | 8篇 |
1981年 | 22篇 |
1980年 | 14篇 |
1979年 | 10篇 |
1978年 | 11篇 |
1977年 | 10篇 |
1973年 | 8篇 |
1971年 | 7篇 |
1967年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Patient and service user engagement in research: a systematic review and synthesized framework 下载免费PDF全文
Nathan D. Shippee PhD Juan Pablo Domecq Garces MD Gabriela J. Prutsky Lopez MD Zhen Wang PhD Tarig A. Elraiyah MBBS Mohammed Nabhan MD Juan P. Brito MBBS Kasey Boehmer BA Rim Hasan MD Belal Firwana MD Patricia J. Erwin MLS Victor M. Montori MD Msc M Hassan Murad MD MPH 《Health expectations》2015,18(5):1151-1166
992.
Mohammad Heydarian Masoud Behzadifar Christos V Chalitsios Mohammad Keshvari Roodabeh Omidifar Mahboubeh Khaton Ghanbari Hasan Abolghasem Gorji Jude Dzevela Kong Jianhong Wu Nicola Luigi Bragazzi 《Ethiopian journal of health sciences》2021,31(6):1109
BackgroundIn February 2020, the Ministry of Health and Medical Education in Iran announced the first case of COVID-19. The aim of this study was to investigate the impact of COVID-19 on the number of CT-Scans and MRI services in public hospitals in western Iran.MethodsWe collected CT-scans and MRI services data from 18 public hospitals via Vice-Chancellor Office, Lorestan University of Medical Sciences from January 2017 to February 2021. Interrupted time series analysis (ITSA) was conducted to assess the impact of COVID-19 on CT-Scans and MRI services. More specifically, ITSA was conducted using ordinary least squares regression with the number of CT-Scans and MRI services per 1,000 registered persons per month as dependent variable.ResultsAt the beginning of the observation period, the monthly rate of CT-Scans was constant (p for trend = 0.267) at 291.9 (from 95%CI 240.5 to 343.4) per 1,000 registered patients. The first case of COVID-19 coincided with an abrupt increase by 211.8 (from 95%CI 102.9 to 320.7) per 1,000 patients. Thereafter, the trend of CT-Scans did not change (p=0.576) compared to the pre-pandemic period. The rate of MRI services was 363.5 per 1,000 per registered patients per month (P = <0.0001) with a slightly decreasing trend (coefficient=-5; 95%CI, -6.9 to -3.1).ConclusionThe findings of this study showed that crises such as COVID-19 can affect the service delivery process. Health policymakers and decision makers should work to prevent potential reductions in health care during events such as COVID-19. 相似文献
993.
994.
The beta2-microglobulin/cystatin C ratio--a potential marker of post-transplant lymphoproliferative disease 总被引:1,自引:0,他引:1
Bökenkamp A Grabensee A Stoffel-Wagner B Hasan C Henne T Offner G Lentze MJ 《Clinical nephrology》2002,58(6):417-422
BACKGROUND: As a consequence of more intensified immunosuppression, post-transplant lymphoproliferative disease (PTLD) is increasingly observed in patients after solid-organ transplantation. Beta2-microglobulin, a low-molecular weight protein (MW 11.8 kDa), is produced by all nucleated cells as part of the HLA complex. Its serum concentration is directly correlated with prognosis in patients with lymphatic neoplasms. Like other low-molecular weight proteins, beta2-microglobulin is eliminated by glomerular filtration. This complicates its use as a tumor marker in renal insufficiency. Cystatin C, a low-molecular weight protein of 13.3 kDa, is a new marker of kidney function largely unaffected by extrarenal disease. We, therefore, sought to assess the potential of the beta2-microglobulin/cystatin C ratio (beta2M/Cys) as a marker of lymphoproliferation. PATIENTS AND METHODS: Beta2M/Cys was determined by particle-enhanced immunonephelometry in sera from 132 children with different degrees of renal insufficiency, 5 of whom had lymphoproliferative disease. Renal function was assessed using the Schwartz formula. RESULTS: Beta2M/Cys was constant between 1.2 and 2.4 mg/mg for Schwartz GFR > or = 40 ml/min x 1.73 m2. With lower GFR, beta2M/Cys rose progressively, maximum values being found in the hemodialysis patients (4.85-11.73). Healthy renal transplant recipients had beta2M/Cys comparable to controls. With acute lymphoproliferative disease, all but one patient had significantly elevated beta2M/Cys between 2.68 and 3.68 mg/mg, which returned to normal in remission (1.67-2.35 mg/mg). The sensitivity of a beta2M/Cys ratio > 2.4 mg/mg for the detection of PTLD was 80%, the specificity 100%, positive predictive value 100%, negative predictive value 90%. CONCLUSION: The beta2-microglobulin/cystatin C ratio is a promising parameter of lymphoproliferation in patients with normal or mildly impaired renal function. 相似文献
995.
996.
Giving adequate information about febrile convulsion and its prognosis would be helpful in alleviating parental stress, and
would contribute to decrease in the morbidity of febrile convulsion. In this study, the knowledge level of parents on taking
body temperature, and decreasing high fever, their attitudes during febrile convulsion and the impact of febrile convulsion
on parents are evaluated. One hundred seventy-four parents of 132 children with FC were enrolled in the study. Twenty-seven
per cent of parents had no thermometer at home, 32.8% of them did not know how to take a temperature, 72.2% of them did not
know the minimum range of increased body temperature, and 69.5% of them did not know how to decrease the increased body temperature.
Thirty-six percent of parents recognised the convulsions when their children suffered from them, the others assumed the convulsion
were fainting spells (6.9%), near death state (38.5%) and suffocation (18.4%). Thirty-six per cent of parents brought their
children to the hospital without doing anything themselves. Most parents (91.4%) had a fear of a recurrence of febrile convulsion
in their children. Seventy-four per cent of parents complained of insomia, 24.3% parents had dyspeptic symptoms even 14 parents
had weight loss due to dyspepsia. 相似文献
997.
998.
999.
Prior to 2003, only 39 cases of oncocytic carcinoma of salivary gland origin had been reported in the English-language literature. We report a new case, which occurred in a 48-year-old woman whose disease had metastasized to regional lymph nodes. She was treated by radical parotidectomy, with sacrifice of the facial nerve, and radical neck dissection. At the 3-year follow-up, she remained free of disease. Our review of the literature suggests that patients with such tumors who undergo aggressive surgery rather than conservative treatment have the best prognosis. 相似文献
1000.
Aysegul Cansu Mehmet Soyturk Mehmet Halil Ozturk Sibel Kul Zerrin Pulathan Hasan Dinc 《European journal of radiology》2013