全文获取类型
收费全文 | 13872篇 |
免费 | 1510篇 |
国内免费 | 59篇 |
专业分类
耳鼻咽喉 | 154篇 |
儿科学 | 438篇 |
妇产科学 | 325篇 |
基础医学 | 1899篇 |
口腔科学 | 495篇 |
临床医学 | 1947篇 |
内科学 | 2313篇 |
皮肤病学 | 263篇 |
神经病学 | 1111篇 |
特种医学 | 571篇 |
外国民族医学 | 3篇 |
外科学 | 2041篇 |
综合类 | 351篇 |
一般理论 | 9篇 |
预防医学 | 1242篇 |
眼科学 | 250篇 |
药学 | 1087篇 |
中国医学 | 12篇 |
肿瘤学 | 930篇 |
出版年
2021年 | 144篇 |
2020年 | 105篇 |
2019年 | 152篇 |
2018年 | 224篇 |
2017年 | 199篇 |
2016年 | 196篇 |
2015年 | 234篇 |
2014年 | 313篇 |
2013年 | 477篇 |
2012年 | 541篇 |
2011年 | 551篇 |
2010年 | 379篇 |
2009年 | 408篇 |
2008年 | 521篇 |
2007年 | 612篇 |
2006年 | 592篇 |
2005年 | 524篇 |
2004年 | 523篇 |
2003年 | 478篇 |
2002年 | 531篇 |
2001年 | 493篇 |
2000年 | 502篇 |
1999年 | 449篇 |
1998年 | 252篇 |
1997年 | 213篇 |
1996年 | 240篇 |
1995年 | 210篇 |
1994年 | 220篇 |
1993年 | 161篇 |
1992年 | 309篇 |
1991年 | 316篇 |
1990年 | 300篇 |
1989年 | 284篇 |
1988年 | 289篇 |
1987年 | 272篇 |
1986年 | 280篇 |
1985年 | 276篇 |
1984年 | 200篇 |
1983年 | 165篇 |
1982年 | 111篇 |
1981年 | 130篇 |
1980年 | 112篇 |
1979年 | 182篇 |
1978年 | 119篇 |
1977年 | 121篇 |
1976年 | 118篇 |
1974年 | 108篇 |
1973年 | 109篇 |
1972年 | 110篇 |
1968年 | 114篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ABSTRACTCommunication between health professionals and patients is an intergroup phenomenon where the health professional has the most power and status. Over the past few decades, there has been a steady increase in the availability to patients of information about healthcare and specific diseases on the Internet. In this paper, we ask whether the use of Internet health information assists patients to manage their consultations with health professionals better and whether it alters the intergroup dynamic by providing a more equal status for patients. In this study 370 participants from Australia and Canada completed a survey that included a ‘willingness to communicate with health professionals’ scale. They also commented on their use and trust of Internet health information. Thematic analysis suggests that patients’ use of Internet health information serves as a broker between patients and their health provider in health consultations. We discuss the implications of these findings for health practitioners as they address how easier Internet access influences patient interactions with health professionals. We consider future research directions these finding provide in explaining communication behaviour in this context. 相似文献
2.
3.
R. Watson T. Kozlowski V. Nickeleit J. T. Woosley J. L. Schmitz S. L. Zacks J. H. Fair D. A. Gerber K. A. Andreoni 《American journal of transplantation》2006,6(12):3022-3029
Antibody-mediated rejection (AMR) after liver transplantation is recognized in ABO incompatible and xeno-transplantation, but its role after ABO compatible liver transplantation is controversial. We report a case of ABO compatible liver transplantation that demonstrated clinical, serological and histological signs of AMR without evidence of concurrent acute cellular rejection. AMR with persistently high titers of circulating donor specific antibodies resulted in graft injury with initial centrilobular hepatocyte necrosis, fibroedematous portal expansion mimicking biliary tract outflow obstruction, ultimately resulting in extensive bridging fibrosis. Immunofluorescence microscopy demonstrated persistent, diffuse linear C4d deposits along sinusoids and central veins. Despite intense therapeutic intervention including plasmapheresis, IVIG and rituximab, AMR led to graft failure. We present evidence that an antibody-mediated alloresponse to an ABO compatible liver graft can cause significant graft injury independent of acute cellular rejection. AMR shows distinct histologic changes including a characteristic staining profile for C4d. 相似文献
4.
5.
6.
P Avalos-Peralta† A Herrera† JJ Ríos-Martín‡ AM Pérez-Bernal† D Moreno-Ramírez† F Camacho† 《Journal of the European Academy of Dermatology and Venereology》2006,20(1):79-83
We report the case of a patient with a 13-year history of pemphigus vulgaris (PV) treated with immunosuppressive agents, prednisone and mycophenolate mofetil who had developed lesions of Kaposi's sarcoma (KS) on a sole plaque of PV that had been previously treated with intralesional injections of steroids. The lesions were surgically removed and polymerase chain reaction (PCR) demonstrated human herpesvirus-8 (HHV-8) DNA. There were neither recurrences nor later dissemination of KS following gradual decrease of the immunosuppressive therapy. We suggest that the treatment with intralesional steroids may have influenced the local reactivation of a latent infection of the virus, determining the appearance of this localized KS. 相似文献
7.
8.
9.
In 1981 a statewide program supplying free insulin to 3,720 patients of state health clinics was discontinued. We attempted to assess whether this action had an adverse effect medically and financially on those concerned. A computer randomized sample of 351 patients (9%) was studied by personal interview and questionnaire. Information obtained focused on certain events that occurred 18 months before and after the program ceased. Measurements used to determine medical impact were number of hospitalizations, emergency room and physician visits, changes in weight and glucose levels, and episodes of ketoacidosis. Financial impact was measured by cost of hospitalization and physician visits. Our results revealed no significant changes in any of the medical parameters studied except for fasting serum glucose levels above 300 mg/dl, which occurred less frequently after the free insulin program was discontinued. There were fewer hospitalizations, more visits to physicians, and no change in number of emergency room visits after discontinuance of the free program. The overall cost saving was estimated to be +883,558 for the 18-month study period, in addition to the +550,000 the plan had been costing the state. 相似文献
10.
Tauseef Ahmed Alan Yagoda Howard I. Scher Cora Sternberg Robin C. Watson 《Investigational new drugs》1986,4(2):171-174
Summary Deaza-aminopterin is a folate analog which is transported more rapidly than methotrexate into cells and appears to be more active than methotrexate against human and animal tumor in vitro. Fifteen patients with advanced urothelial tract cancer were given deaza-aminopterin 30–37.5 mg/m2 IV QW. In responding patients drug was given QOW after 4–6 consecutive doses. Doses were escalated or de-escalated by 7.5 mg/m2 depending on toxicity. Twelve patients had received prior chemotherapy which included methotrexate in nine. Three patients achieved a partial remission lasting 1, 3, and 3 months respectively: all responders had previously failed methotrexate after an initial response to a methotrexate containing regimen. None of the six patients who were methotrexate naive responded to deaza-aminopterin; 3 subsequently received methotrexate without response. Mild mucositis was universal and in 5 was severe. Six patients had an increase in liver transaminases probably secondary to anti-folate hepatotoxicity. Other toxicities included diarrhea, nausea, skin rash and fever. Further studies are needed to define the precise efficacy of deaza-aminopterin in patients with urothelial tract cancers. 相似文献