全文获取类型
收费全文 | 699篇 |
免费 | 59篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 16篇 |
妇产科学 | 6篇 |
基础医学 | 104篇 |
口腔科学 | 18篇 |
临床医学 | 57篇 |
内科学 | 201篇 |
皮肤病学 | 12篇 |
神经病学 | 23篇 |
特种医学 | 12篇 |
外科学 | 136篇 |
综合类 | 27篇 |
预防医学 | 33篇 |
眼科学 | 19篇 |
药学 | 45篇 |
中国医学 | 2篇 |
肿瘤学 | 45篇 |
出版年
2023年 | 5篇 |
2022年 | 13篇 |
2021年 | 12篇 |
2020年 | 10篇 |
2019年 | 12篇 |
2018年 | 21篇 |
2017年 | 22篇 |
2016年 | 18篇 |
2015年 | 18篇 |
2014年 | 33篇 |
2013年 | 43篇 |
2012年 | 46篇 |
2011年 | 46篇 |
2010年 | 37篇 |
2009年 | 31篇 |
2008年 | 36篇 |
2007年 | 47篇 |
2006年 | 45篇 |
2005年 | 38篇 |
2004年 | 30篇 |
2003年 | 20篇 |
2002年 | 23篇 |
2001年 | 15篇 |
2000年 | 9篇 |
1999年 | 14篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1995年 | 5篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 12篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 10篇 |
1987年 | 11篇 |
1986年 | 10篇 |
1985年 | 9篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1969年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有761条查询结果,搜索用时 46 毫秒
91.
92.
93.
94.
We describe 5 patients, aged 22–69 years, with massive splenomegaly of unknown origin and features of hypersplenism. Splenectomy corrected the cytopenia(s) and abolished the symptoms in each case; the histological features of the spleen were non-specific and included congestive changes and lymphoid hyperplasia. 2 of these patients developed non-Hodgkin's lymphoma (NHL) 2 and 6 years after spenectomy. A total of 46 cases of splenomegaly of unknown origin have been reported from UK, USA, and Australia so far, and in 9, NHL developed 8 to 80 months after splenectomy. The questions relating to the pathogenesis of splenomegaly and the subsequent development of NHL remain to be answered. We propose that this ‘entity’ be known as Dacie's syndrome, after Sir John Dacie who characterised it in 1969. 相似文献
95.
96.
97.
The incidence of an adenoid cystic carcinoma on major salivary glands is low, constituting only about 10% to 15% of all parotid malignancies. Cases of delayed metastasis have been reported, but reports of specific renal involvement have not been extensively found. We present the case of a 21-year-old woman with a left renal metastasis from an adenoid cystic carcinoma of the parotid gland that had been surgically treated 7 years previously. The patient underwent successful left radical nephrectomy. During follow-up, the patient developed pulmonary nodules that were metastatic adenoid cystic carcinoma and were surgically excised. At last follow-up, the patient was doing well with no evidence of disease. 相似文献
98.
A total of 16 of 86 patients (19%) with non-Hodgkin's lymphoma were found to have intrathoracic disease in this retrospective study. Paratracheal, mediastinal, and hilar lymphadenopathy was the commonest manifestation followed by pulmonary lesions and pleural effusion. The lymphoma was at an advanced clinical stage in all the patients with intrathoracic disease. About one-third of the intrathoracic lesions first developed at the time of relapse after successful initial therapy. There was a better response to therapy when intrathoracic disease was part of the initial presentation than when it was a manifestation of relapse. If it did not respond to therapy it was always indicative of a poor prognosis. 相似文献
99.
100.
Sasirekha Ramani Premi Sankaran Rajesh Arumugam Rajiv Sarkar Indrani Banerjee Ipsita Mohanty Atanu Kumar Jana Kurien Anil Kuruvilla Gagandeep Kang 《Journal of medical virology》2010,82(10):1803-1807
A single rotavirus strain causing asymptomatic infections as well as severe gastrointestinal disease has been described in the neonatal nurseries of the Christian Medical College, Vellore. In this study, quantitative real‐time RT‐PCR was used to determine the association of viral load with the presence of gastrointestinal symptoms in neonates. Viral load was estimated in terms of the crossing point [C(t) value] at which the amplicon could be detected in the real‐time PCR assay. The study was carried out on 103 neonates, including 33 asymptomatic neonates and 70 neonates with different gastrointestinal symptoms. The duration of virus shedding was also compared between five symptomatic and four asymptomatic neonates using real‐time RT‐PCR. There was no significant difference in viral load between symptomatic and asymptomatic neonates (P = 0.087). Among neonates with different gastrointestinal symptoms, those presenting with feed intolerance and abdominal distension had a significantly higher viral load than those with other gastrointestinal symptoms (P = 0.02). For the study on virus shedding, nine neonates were followed up for a median duration of 53 days, with a median of 31 samples tested per child. Extended shedding of low copies of rotavirus was found, with no significant differences in pattern of shedding between symptomatic and asymptomatic neonates. The lack of correlation between viral load and gastrointestinal disease demonstrates yet another difference between neonatal rotavirus infection and infection in older children where higher viral load correlates with severe disease. J. Med. Virol. 82:1803–1807, 2010. © 2010 Wiley‐Liss, Inc. 相似文献