全文获取类型
收费全文 | 2200篇 |
免费 | 115篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 69篇 |
妇产科学 | 29篇 |
基础医学 | 250篇 |
口腔科学 | 19篇 |
临床医学 | 150篇 |
内科学 | 607篇 |
皮肤病学 | 74篇 |
神经病学 | 184篇 |
特种医学 | 79篇 |
外科学 | 358篇 |
综合类 | 37篇 |
一般理论 | 1篇 |
预防医学 | 82篇 |
眼科学 | 48篇 |
药学 | 160篇 |
中国医学 | 3篇 |
肿瘤学 | 165篇 |
出版年
2023年 | 18篇 |
2022年 | 33篇 |
2021年 | 79篇 |
2020年 | 42篇 |
2019年 | 80篇 |
2018年 | 52篇 |
2017年 | 61篇 |
2016年 | 63篇 |
2015年 | 68篇 |
2014年 | 105篇 |
2013年 | 139篇 |
2012年 | 208篇 |
2011年 | 242篇 |
2010年 | 92篇 |
2009年 | 102篇 |
2008年 | 170篇 |
2007年 | 119篇 |
2006年 | 147篇 |
2005年 | 112篇 |
2004年 | 94篇 |
2003年 | 62篇 |
2002年 | 56篇 |
2001年 | 27篇 |
2000年 | 20篇 |
1999年 | 10篇 |
1998年 | 14篇 |
1997年 | 7篇 |
1996年 | 7篇 |
1995年 | 12篇 |
1994年 | 4篇 |
1993年 | 5篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 6篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1986年 | 6篇 |
1985年 | 4篇 |
1984年 | 2篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1969年 | 2篇 |
1964年 | 2篇 |
排序方式: 共有2326条查询结果,搜索用时 203 毫秒
41.
Tess Petersen Kerry Townsend Lori A. Gordon Sreetha Sidharthan Rachel Silk Amy Nelson Chloe Gross Monica Calderón Michael Proschan Anu Osinusi Michael A. Polis Henry Masur Shyam Kottilil Anita Kohli 《Hepatology International》2016,10(2):310-319
Background
As treatment for chronic hepatitis C (HCV) virus has evolved to all-oral, interferon-free directly acting antiviral (DAA) therapy, the impact of these improvements on patient adherence has not been described.Methods
Medication adherence was measured in 60 HCV, genotype-1, treatment-naïve participants enrolled in a phase 2a clinical trial at the National Institutes of Health and community clinics. Participants received either ledipasvir/sofosbuvir (LDV/SOF) (90 mg/400 mg) (one pill) daily for 12 weeks, LDV/SOF + GS-9451 (80 mg/day) (two pills) daily for 6 weeks, or LDV/SOF + GS-9669 (500 mg twice daily; three pills, two in the morning, one in the evening) for 6 weeks. Adherence was measured using medication event monitoring system (MEMS) caps, pill counts and patient report.Results
Overall adherence to DAAs was high. Adherence declined over the course of the 12-week treatment (p = 0.04). While controlled psychiatric disease or symptoms of depression did not influence adherence, recent drug use was a risk factor for non-adherence to 12-week (p = 0.01), but not 6-week regimens. Adherence as measured by MEMS was lower than by patient report.Conclusions
Adherence to short courses of DAA therapy with 1–3 pills a day was excellent in an urban population with multiple risk factors for non-adherence.42.
43.
Visceral leishmaniasis: current status of control,diagnosis, and treatment,and a proposed research and development agenda 总被引:13,自引:0,他引:13
Guerin PJ Olliaro P Sundar S Boelaert M Croft SL Desjeux P Wasunna MK Bryceson AD 《The Lancet infectious diseases》2002,2(8):494-501
Visceral leishmaniasis is common in less developed countries, with an estimated 500000 new cases each year. Because of the diversity of epidemiological situations, no single diagnosis, treatment, or control will be suitable for all. Control measures through case finding, treatment, and vector control are seldom used, even where they could be useful. There is a place for a vaccine, and new imaginative approaches are needed. HIV co-infection is changing the epidemiology and presents problems for diagnosis and case management. Field diagnosis is difficult; simpler, less invasive tests are needed. Current treatments require long courses and parenteral administration, and most are expensive. Resistance is making the mainstay of treatment, agents based on pentavalent antimony, useless in northeastern India, where disease incidence is highest. Second-line drugs (pentamidine and amphotericin B) are limited by toxicity and availability, and newer formulations of amphotericin B are not affordable. The first effective oral drug, miltefosine, has been licensed in India, but the development of other drugs in clinical phases (paromomycin and sitamaquine) is slow. No novel compound is in the pipeline. Drug combinations must be developed to prevent drug resistance. Despite these urgent needs, research and development has been neglected, because a disease that mainly affects the poor ranks as a low priority in the private sector, and the public sector currently struggles to undertake the development of drugs and diagnostics in the absence of adequate funds and infrastructure. This article reviews the current situation and perspectives for diagnosis, treatment, and control of visceral leishmaniasis, and lists some priorities for research and development. 相似文献
44.
45.
Arpita Kulshrestha Vasundhra Bhandari Rupkatha Mukhopadhyay V. Ramesh Shyam Sundar Louis Maes Jean Claude Dujardin Syamal Roy Poonam Salotra 《Parasitology research》2013,112(2):825-828
Simple, cost-effective approach for routine surveillance of parasite susceptibility to antileishmanial drug miltefosine (MIL) is highly desirable for controlling emergence of drug resistance in visceral leishmaniasis (VL). We validated a simple resazurin-based fluorimetric assay using promastigotes to track natural MIL tolerance in Leishmania donovani parasites from VL cases (n?=?17) against standard amastigote assay, in two different labs in India. The inter-stage MIL susceptibility correlated strongly (r?=?0.70, p?=?0.0018) using J774.A.1 macrophage cell line-based amastigote assay and fluorescence-based resazurin assay for promastigotes. Investigation of inter-stage MIL susceptibility for the same set of clinical isolates in another lab also showed a strong correlation (r?=?0.72, p?=?0.0012) using mouse peritoneal macrophages for amastigote assay and resazurin-based alamar blue assay for promastigotes. Additionally, parasites from post-kala-azar dermal leishmaniasis (PKDL) lesions (n?=?7, r?=?0.78, p?=?0.046) and MIL-induced parasites (r?=?0.92, p?=?0.0001; n?=?3) also exhibited a strongly correlated inter-stage miltefosine susceptibility. Thus, our results support the utility of resazurin assay as a simplified biological tool for MIL susceptibility monitoring in clinical isolates from MIL-treated VL/PKDL patients. 相似文献
46.
Sriram Krishnamurthy Parameswaran Narayanan Sivaprakasam Prabha Nivedita Mondal Subramanian Mahadevan Niranjan Biswal Sadagopan Srinivasan 《Indian Journal of Critical Care Medicine》2013,17(4):207-213
Background:
Although the term acute renal failure was replaced by acute kidney injury (AKI) recently, there is a paucity of data on the incidence and profile of AKI in critically ill children from the developing world.Objectives:
The objective of this study is to determine the incidence, etiology, short term outcome and predictors of fatality in critically ill children admitted to the pediatric intensive care unit (PICU) with AKI, aged 1 month to 13 years.Materials and Methods:
In this prospective observational study, from June 2010 to March 2011, 215 children admitted to the PICU were screened for AKI, defined according to the AKI Network criteria. The patients with AKI were followed-up until discharge/death. Their clinical and biochemical data were recorded.Results:
The incidence of AKI among 215 patients screened was 54 (25.1%). The common etiologies were infections, [34 (62.9%)], acute glomerulonephritis (7.6%), snake envenomation (5.7%), hemolytic uremic syndrome (3.8%) and congestive cardiac failures (3.8%). Among infections, pneumonia and septicemia constituted 26.5% each, meningoencephalitis accounted for 23.5%, and dengue, scrub typhus, tuberculosis and malaria constituted 9.3% of children with AKI. 27.8% of patients required dialysis. Overall mortality was 46.3%. On logistic regression analysis, requirement of mechanical ventilation was an independent predictor of fatality in AKI.Conclusions:
Besides the high incidence of AKI in critically ill-children admitted to the PICU (25.1%), the condition was associated with adverse outcomes, including high mortality (46.3%) and need for dialysis (27.8%). Infections dominated the etiological profile. Requirement of mechanical ventilation predicted an adverse outcome in our patient population. 相似文献47.
48.
Susovan Banerjee Shikha Goyal Saumyaranjan Mishra Deepak Gupta Shyam Singh Bisht Venketesan K Kushal Narang Tejinder Kataria 《The British journal of radiology》2021,94(1122)
Artificial intelligence (AI) applications, in the form of machine learning and deep learning, are being incorporated into practice in various aspects of medicine, including radiation oncology. Ample evidence from recent publications explores its utility and future use in external beam radiotherapy. However, the discussion on its role in brachytherapy is sparse. This article summarizes available current literature and discusses potential uses of AI in brachytherapy, including future directions. AI has been applied for brachytherapy procedures during almost all steps, starting from decision-making till treatment completion. AI use has led to improvement in efficiency and accuracy by reducing the human errors and saving time in certain aspects. Apart from direct use in brachytherapy, AI also contributes to contemporary advancements in radiology and associated sciences that can affect brachytherapy decisions and treatment. There is a renewal of interest in brachytherapy as a technique in recent years, contributed largely by the understanding that contemporary advances such as intensity modulated radiotherapy and stereotactic external beam radiotherapy cannot match the geometric gains and conformality of brachytherapy, and the integrated efforts of international brachytherapy societies to promote brachytherapy training and awareness. Use of AI technologies may consolidate it further by reducing human effort and time. Prospective validation over larger studies and incorporation of AI technologies for a larger patient population would help improve the efficiency and acceptance of brachytherapy. The enthusiasm favoring AI needs to be balanced against the short duration and quantum of experience with AI in limited patient subsets, need for constant learning and re-learning to train the AI algorithms, and the inevitability of humans having to take responsibility for the correctness and safety of treatments. 相似文献
49.
50.
Maheshkumar N Upasani Supriya Chopra Reena Engineer Umesh Mahantshetty Seema Medhi Zubin Mehta Shyam K Shrivastava 《The British journal of radiology》2015,88(1054)