收费全文 | 931881篇 |
免费 | 66167篇 |
国内免费 | 1341篇 |
耳鼻咽喉 | 12957篇 |
儿科学 | 24360篇 |
妇产科学 | 23232篇 |
基础医学 | 132872篇 |
口腔科学 | 28246篇 |
临床医学 | 80526篇 |
内科学 | 183218篇 |
皮肤病学 | 19226篇 |
神经病学 | 72165篇 |
特种医学 | 36809篇 |
外国民族医学 | 79篇 |
外科学 | 152071篇 |
综合类 | 18042篇 |
现状与发展 | 1篇 |
一般理论 | 234篇 |
预防医学 | 61735篇 |
眼科学 | 21309篇 |
药学 | 72520篇 |
3篇 | |
中国医学 | 2162篇 |
肿瘤学 | 57622篇 |
2018年 | 8959篇 |
2017年 | 7025篇 |
2016年 | 7758篇 |
2015年 | 8856篇 |
2014年 | 11980篇 |
2013年 | 17491篇 |
2012年 | 24079篇 |
2011年 | 25025篇 |
2010年 | 14800篇 |
2009年 | 14262篇 |
2008年 | 24593篇 |
2007年 | 25681篇 |
2006年 | 26471篇 |
2005年 | 25418篇 |
2004年 | 24553篇 |
2003年 | 23597篇 |
2002年 | 23141篇 |
2001年 | 54724篇 |
2000年 | 56542篇 |
1999年 | 46947篇 |
1998年 | 10730篇 |
1997年 | 9464篇 |
1996年 | 9592篇 |
1995年 | 8926篇 |
1994年 | 8278篇 |
1993年 | 7593篇 |
1992年 | 35488篇 |
1991年 | 33911篇 |
1990年 | 32734篇 |
1989年 | 31869篇 |
1988年 | 28991篇 |
1987年 | 28249篇 |
1986年 | 26288篇 |
1985年 | 25144篇 |
1984年 | 17832篇 |
1983年 | 15141篇 |
1982年 | 7795篇 |
1981年 | 6771篇 |
1979年 | 15783篇 |
1978年 | 10598篇 |
1977年 | 9052篇 |
1976年 | 7871篇 |
1975年 | 8628篇 |
1974年 | 10466篇 |
1973年 | 9859篇 |
1972年 | 9357篇 |
1971年 | 8852篇 |
1970年 | 8426篇 |
1969年 | 7923篇 |
1968年 | 7200篇 |
- HIF were greater in number than AMFs, but AMFs increase in the presence of increasing HIF, suggesting an anatomic relationship.
- SLs were associated with greater numbers of both HIF and AMF/patient (pt.) versus no SL, 6.7 versus 2.7/pt. and 3.3 versus 2.0/pt., respectively. SL presence correlated more closely to HIF than to AMF presence within the entire 358-patient group.
- When HIF and AMF were classified as combined (concurrent HIF and AMF, with ≥1 of each both present in the same patient [HIF+AMF]) or continuous (AMF appearing to extend to and join an HIF [AMF>HIF]), HIF and AMF/pt. each differed numerically and patients with an SL had more combined HIF+AMF and continuous AMF>HIF than patients without an SL.
- In patients with both SL and combined HIF+AMF (a circumstance allowing the possibility of a relationship of all 3 structures), HIF become proportionally fewer compared with AMFs. In patients with an SL actually exhibiting continuous AMF>HIF, the HIF/AMF ratio decreased further.
Materials and Methods: Relevant papers in PubMed published through June 2017 were selected to track updated information about PTL with an emphasis on diagnosis and novel therapeutic management.
Results: The most frequent cases include non-Hodgkin lymphoma derived from B-cells, mainly diffuse large B-cell lymphoma (DLBCL) followed by mucosa-associated lymphoid tissue (MALT) lymphoma or a mixed type. Other subtypes are less common. Lymphomas derived from T-cells and Hodgkin lymphomas are extremely rare. Hashimoto's autoimmune thyroiditis has been implicated as a risk factor for lymphoma. At the molecular level, the Wnt5a protein and its receptor Ror2 are involved in the course of the disease. Ultrasonography, fine needle aspiration (FNA) biopsy, and core or open biopsy combined with new diagnostic facilities contribute to an accurate diagnosis. An increased potential exists for a cure without the need for a radical surgical procedure. Modern chemoradiation therapy plus the monoclonal antibody rituximab, which acts against CD20, have limited the need for surgical interventions and provide an excellent outcome in most cases. However, some cases have resulted in treatment failure or recurrence.
Conclusions: A multidisciplinary approach must be used to define the management policy in each case. Future efforts by researchers are likely to be focused on the molecular level. 相似文献