全文获取类型
收费全文 | 1579篇 |
免费 | 106篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 21篇 |
儿科学 | 32篇 |
妇产科学 | 37篇 |
基础医学 | 185篇 |
口腔科学 | 59篇 |
临床医学 | 124篇 |
内科学 | 345篇 |
皮肤病学 | 138篇 |
神经病学 | 131篇 |
特种医学 | 56篇 |
外科学 | 193篇 |
综合类 | 18篇 |
预防医学 | 89篇 |
眼科学 | 27篇 |
药学 | 117篇 |
中国医学 | 23篇 |
肿瘤学 | 96篇 |
出版年
2023年 | 12篇 |
2022年 | 14篇 |
2021年 | 42篇 |
2020年 | 36篇 |
2019年 | 48篇 |
2018年 | 67篇 |
2017年 | 39篇 |
2016年 | 45篇 |
2015年 | 65篇 |
2014年 | 62篇 |
2013年 | 75篇 |
2012年 | 112篇 |
2011年 | 133篇 |
2010年 | 66篇 |
2009年 | 56篇 |
2008年 | 97篇 |
2007年 | 102篇 |
2006年 | 80篇 |
2005年 | 80篇 |
2004年 | 71篇 |
2003年 | 53篇 |
2002年 | 61篇 |
2001年 | 39篇 |
2000年 | 30篇 |
1999年 | 29篇 |
1998年 | 11篇 |
1997年 | 5篇 |
1995年 | 3篇 |
1994年 | 11篇 |
1993年 | 4篇 |
1992年 | 19篇 |
1991年 | 10篇 |
1990年 | 13篇 |
1989年 | 14篇 |
1988年 | 12篇 |
1987年 | 6篇 |
1985年 | 5篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1976年 | 4篇 |
1975年 | 10篇 |
1974年 | 4篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1970年 | 4篇 |
1968年 | 2篇 |
1967年 | 2篇 |
1966年 | 3篇 |
1959年 | 2篇 |
排序方式: 共有1691条查询结果,搜索用时 15 毫秒
1.
Ahmad Adebayo Irekeola Engku Nur Syafirah E.A.R. Yusuf Wada Rohimah Mohamud Norhafiza Mat Lazim Chan Yean Yean Rafidah Hanim Shueb 《Indian journal of medical microbiology》2022,40(3):420-426
BackgroundEpstein-Barr virus (EBV) is a member of the herpesvirus family that is known to ubiquitously infect people worldwide. However, the actual prevalence of EBV infection in diseased patients in Nigeria, remains unknown. This study was thus conducted to ascertain the true prevalence.MethodsA systematic review and meta-analysis of published data was conducted according to the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). Electronic databases including PubMed, Scopus, ScienceDirect, and Google Scholar were searched for studies reporting the occurrence of EBV infection among patients with established diseases. Studies were included if they assessed EBV infection in diseased patients in Nigeria. Data were extracted and subsequently analysed using R software. Funnel plot and Egger's regression test was used to assess publication bias, while JBI prevalence tool was used to assess study quality.ResultsA total of 13 studies covering 228 cases of EBV infection among 1157 diseased patients were included. Summary estimates were computed using random-effects model. The pooled prevalence of EBV infection was 20.3% (95% CI: 10.8–34.9, I2 ?= ?92.26, p ?< ?0.001). When stratified according to the type of disease, higher estimates were obtained for patients suffering from Kaposi's sarcoma (98.7%, 95% CI: 82.2–99.9) and Nasopharyngeal malignancy (85.7%, 95% CI: 70.0–93.9). A prevalence of 13.4% (95% CI: 6.0–27.4) and 12.2% (95% CI: 4.8–27.8) was derived for the most reported patient populations, lymphoma and HIV, respectively.ConclusionThis first meta-analysis on the prevalence of EBV among Nigerian patients suffering from various diseases reveals a prevalence that emphasises the need to routinely monitor EBV infection in all EBV-associated diseases in Nigeria. 相似文献
2.
Gonzalo Lambert Darío Teplisky Mariela Cabezas Ioná Szhafir Mauricio Silva Matías Garriga Alejandro Oliva Sergio Sierre 《Journal of vascular and interventional radiology : JVIR》2021,32(1):80-86
PurposeTo evaluate feasibility, safety, and results of endovenous mechanochemical ablation (MOCA) for treatment of persistent embryonic and dysplastic veins in pediatric patients with Klippel-Trénaunay syndrome (KTS).Materials and MethodsThirteen MOCA procedures were performed in 11 patients (age range, 4–16 years) with KTS and symptomatic persistent embryonic or dysplastic veins during a 24-month period. All patients were evaluated with color Doppler (CD) ultrasound (US), contrast-enhanced MR imaging, and venography to assess the anatomy of the target vessels and patency of the deep venous system. All procedures were performed under general anesthesia with a ClariVein catheter and liquid sodium tetradecyl sulfate as the sclerosing agent. US and fluoroscopic guidance were used in all cases. Technical success rate, primary occlusion rate, adverse effects, and recanalization rates were evaluated. Clinical and radiological (CD US) controls were performed 1 day, 7 days, 1 month, and 6 months after the procedure and once a year thereafter, with a mean follow-up of 16 months (range, 6–25 months).ResultsTechnical success and primary occlusion were achieved in all patients with no adverse events. During the follow-up period, CD US demonstrated partial recanalization and symptom recurrence in 2 patients (18%), 14 and 18 months after the initial procedure. These 2 patients had a second ablation procedure with no recanalization or symptom recurrence during the subsequent follow-up period.ConclusionsMOCA is feasible and appears to be a safe and effective technique for treatment of varicose veins in pediatric patients with KTS. 相似文献
3.
4.
Lunetta Christian Moglia Cristina Lizio Andrea Caponnetto Claudia Dubbioso Raffaele Giannini Fabio Matà Sabrina Mazzini Letizia Sabatelli Mario Siciliano Gabriele Simone Isabella Laura Sorarù Gianni Toriello Antonella Trojsi Francesca Vedovello Marcella D’Ovidio Fabrizio Filippi Massimo Calvo Andrea 《Journal of neurology》2020,267(11):3258-3267
Journal of Neurology - The aim of the study is to analyze the ALS disease progression and respiratory function of Italian patients treated with edaravone (EVN), as well as the adherence to, and the... 相似文献
5.
Halimatus Sakdiah Minhat Hazwan Mat Din 《International Journal of Mental Health Promotion, The》2020,22(4):283-290
The rapid ageing process experienced by many developing countries,
lead issues and challenges to deal with the highly demanding social care sector.
This qualitative study aimed to explore the understanding and views of the formal
caregivers in Malaysia towards social care for older persons. Series of focus group
discussions were conducted among 57 institutional social care workers at four
public residential care in Peninsular Malaysia based on the identified zones.
Two groups of participants involved, those aged less than 40 years old and
40 years old and above, divided based on the mean age. The interview was transcribed verbatim and inductive thematic analysis was conducted to identify the
related coding and themes. Three themes were identified to explain the views
and understanding of the participants related to social care for older persons
namely, religious values, health impact and knowledge. Although many participants emphasized on the negative impact of caregiving for older persons on physical and mental health of the caregivers, they also viewed the job as noble and a
useful platform to gain knowledge and enrich their personal experiences related
to the later life. Acknowledgement of the negative impacts on health of the
carers by the relevant authorities are very important to ensure productivity
and quality of work, healthy and safe workplace environment and maintaining
the rights of workers. 相似文献
6.
7.
Kristen E. Pauken Osmaan Shahid Kaitlyn A. Lagattuta Kelly M. Mahuron Jacob M. Luber Margaret M. Lowe Linglin Huang Conor Delaney Jaclyn M. Long Megan E. Fung Kathleen Newcomer Katy K. Tsai Melissa Chow Samantha Guinn Juhi R. Kuchroo Kelly P. Burke Jason M. Schenkel Michael D. Rosenblum Adil I. Daud Arlene H. Sharpe Meromit Singer 《The Journal of experimental medicine》2021,218(4)
8.
Obstruction remains as an important cause of failure in the eruption of a tooth. In this article, a 15-year-old girl was presented with retained upper left primary canine (63) and first primary molar (64), while the contralateral permanent canine (13) and premolars (14 and 15) have erupted. Upon radiographic examination, a mass which was diagnosed later to be compound odontome was detected. The treatment consisted of surgical removal of the odontome, extraction of the primary canine (63) and left permanent canine (23), and transplantation of the permanent canine (23). The management of this case and the literature related to autotransplantation are discussed. 相似文献
9.
The Adult Macaque Spinal Cord Central Canal Zone Contains Proliferative Cells And Closely Resembles The Human 下载免费PDF全文
Clara Alfaro‐Cervello Arantxa Cebrian‐Silla Mario Soriano‐Navarro Patricia Garcia‐Tarraga Jorge Matías‐Guiu Ulises Gomez‐Pinedo Pilar Molina Aguilar Arturo Alvarez‐Buylla Maria‐Rosario Luquin Jose Manuel Garcia‐Verdugo 《The Journal of comparative neurology》2014,522(8):1800-1817
The persistence of proliferative cells, which could correspond to progenitor populations or potential cells of origin for tumors, has been extensively studied in the adult mammalian forebrain, including human and nonhuman primates. Proliferating cells have been found along the entire ventricular system, including around the central canal, of rodents, but little is known about the primate spinal cord. Here we describe the central canal cellular composition of the Old World primate Macaca fascicularis via scanning and transmission electron microscopy and immunohistochemistry and identify central canal proliferating cells with Ki67 and newly generated cells with bromodeoxyuridine incorporation 3 months after the injection. The central canal is composed of uniciliated, biciliated, and multiciliated ependymal cells, astrocytes, and neurons. Multiciliated ependymal cells show morphological characteristics similar to multiciliated ependymal cells from the lateral ventricles, and uniciliated and biciliated ependymal cells display cilia with large, star‐shaped basal bodies, similar to the Ecc cells described for the rodent central canal. Here we show that ependymal cells with one or two cilia, but not multiciliated ependymal cells, proliferate and give rise to new ependymal cells that presumably remain in the macaque central canal. We found that the infant and adult human spinal cord contains ependymal cell types that resemble those present in the macaque. Interestingly, a wide hypocellular layer formed by bundles of intermediate filaments surrounded the central canal both in the monkey and in the human, being more prominent in the stenosed adult human central canal. J. Comp. Neurol. 522:1800–1817, 2014. © 2013 Wiley Periodicals, Inc. 相似文献
10.