全文获取类型
收费全文 | 2191篇 |
免费 | 116篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 30篇 |
妇产科学 | 64篇 |
基础医学 | 244篇 |
口腔科学 | 5篇 |
临床医学 | 220篇 |
内科学 | 288篇 |
皮肤病学 | 26篇 |
神经病学 | 189篇 |
特种医学 | 67篇 |
外科学 | 595篇 |
综合类 | 12篇 |
预防医学 | 142篇 |
眼科学 | 72篇 |
药学 | 114篇 |
中国医学 | 1篇 |
肿瘤学 | 245篇 |
出版年
2023年 | 16篇 |
2022年 | 16篇 |
2021年 | 29篇 |
2020年 | 24篇 |
2019年 | 29篇 |
2018年 | 30篇 |
2017年 | 29篇 |
2016年 | 33篇 |
2015年 | 50篇 |
2014年 | 53篇 |
2013年 | 101篇 |
2012年 | 123篇 |
2011年 | 107篇 |
2010年 | 59篇 |
2009年 | 64篇 |
2008年 | 133篇 |
2007年 | 106篇 |
2006年 | 129篇 |
2005年 | 116篇 |
2004年 | 110篇 |
2003年 | 112篇 |
2002年 | 106篇 |
2001年 | 46篇 |
2000年 | 64篇 |
1999年 | 50篇 |
1998年 | 33篇 |
1997年 | 28篇 |
1996年 | 23篇 |
1995年 | 28篇 |
1994年 | 17篇 |
1992年 | 23篇 |
1991年 | 27篇 |
1990年 | 27篇 |
1989年 | 21篇 |
1988年 | 32篇 |
1987年 | 31篇 |
1986年 | 22篇 |
1985年 | 25篇 |
1984年 | 21篇 |
1983年 | 25篇 |
1982年 | 20篇 |
1981年 | 17篇 |
1980年 | 18篇 |
1979年 | 21篇 |
1978年 | 14篇 |
1977年 | 13篇 |
1975年 | 14篇 |
1974年 | 14篇 |
1973年 | 15篇 |
1971年 | 10篇 |
排序方式: 共有2334条查询结果,搜索用时 15 毫秒
71.
Rainer Müller Heike Meißner Gunter Böttcher Lutz Jatzwauk Ludwig Kant Matthias C. Schulz Bernd Reitemeier 《Supportive care in cancer》2015,23(10):3089-3093
Purpose
At the moment, there is an inadequate margin fit of commercially available stoma buttons. The aim of the present study was to develop a customized short tracheal cannula based on digital data. Furthermore, the applied material has to be evaluated considering germ colonization and appropriate cleaning procedures.Methods
Computed tomographies of 53 patients who underwent laryngectomy were surveyed. Based on the digital data, a customized short tracheal cannula was created and manufactured from silicone. The new cannula was incorporated in ten patients and worn for 4 weeks. A clinical examination of an otolaryngologist and subjective assessment of the patients were carried out. Furthermore, microbiological test considering germ colonization was performed.Results
The customized short tracheal cannula could be incorporated in all patients. The clinical results showed no irritation or mucosal lesions. The subjective individual evaluation by the patients was promising. The proposals for improvement could be considered. The microbiological examination revealed a higher contamination of the silicone compared to the silver cannulas. Both chemical and mechanical decontamination showed sufficient results.Conclusion
A workflow for development and manufacturing of a customized short tracheal cannula from digital data could be established. The cannula is compatible to standard equipment and routine cleaning procedures. Clinical studies are required to evaluate the potential benefit for patients.72.
73.
74.
Gaudet MM Falk RT Stevens RD Gunter MJ Bain JR Pfeiffer RM Potischman N Lissowska J Peplonska B Brinton LA Garcia-Closas M Newgard CB Sherman ME 《The Journal of clinical endocrinology and metabolism》2012,97(9):3216-3223
Context: Endometrial cancer is associated with metabolic disturbances related to its underlying risk factors, including obesity and diabetes. Identifying metabolite biomarkers associated with endometrial cancer may have value for early detection, risk assessment, and understanding etiology. Objective: The objective of the study was to evaluate the reliable measurement of metabolites in epidemiological studies with nonstandardized blood collection; confirm previously reported correlations of metabolites with body size; and assess differences in metabolite levels between cases and controls. Design: This was the Polish Endometrial Cancer Study (2001-2003). Setting: This study was a population-based case-control study. Patients: Patients included 250 cases and 250 controls. Intervention: The intervention included the measurement of serum metabolite levels of 15 amino acids, 45 acylcarnitines, and nine fatty acids. Main Outcome Measure: The main outcome measure was endometrial cancer. Results: Body mass index was correlated with levels of valine (r = 0.26, P = 3.4 × 10(-5)), octenoylcarnitine (r = 0.24, P = 1.5 × 10(-4)), palmitic acid (r = 0.26, P = 4.4 × 10(-5)), oleic acid (r = 0.28, P = 9.9 × 10(-6)), and stearic acid (r = 0.26, P = 2.9 × 10(-5)) among controls. Only stearic acid was inversely associated with endometrial cancer case status (quartile 4 vs. quartile 1: odds ratio 0.37, 95% confidence interval 0.20-0.69, P for trend = 1.2 × 10(-4)). Levels of the C5-acylcarnitines, octenoylcarnitine, decatrienoylcarnitine, and linoleic acid were significantly lower in cases than controls (odds ratios ranged from 0.21 to 0.38). Conclusions: These data demonstrate that previously reported variations in metabolomic profiles with body mass index can be replicated in population-based studies with nonfasting blood collection protocols. We also provide preliminary evidence that large differences in metabolite levels exist between cases and controls, independent of body habitus. Our findings warrant assessment of metabolic profiles, including the candidate markers identified herein, in prospectively collected blood samples to define biomarkers and etiological factors related to endometrial cancer. 相似文献
75.
Assumpção TC Eaton DP Pham VM Francischetti IM Aoki V Hans-Filho G Rivitti EA Valenzuela JG Diaz LA Ribeiro JM 《The American journal of tropical medicine and hygiene》2012,86(6):1005-1014
Triatoma matogrossensis is a Hemiptera that belongs to the oliveirai complex, a vector of Chagas' disease that feeds on vertebrate blood in all life stages. Hematophagous insects' salivary glands (SGs) produce potent pharmacologic compounds that counteract host hemostasis, including anticlotting, antiplatelet, and vasodilatory molecules. Exposure to T. matogrossensis was also found to be a risk factor associated with the endemic form of the autoimmune skin disease pemphigus foliaceus, which is described in the same regions where Chagas' disease is observed in Brazil. To obtain a further insight into the salivary biochemical and pharmacologic diversity of this kissing bug and to identify possible allergens that might be associated with this autoimmune disease, a cDNA library from its SGs was randomly sequenced. We present the analysis of a set of 2,230 (SG) cDNA sequences, 1,182 of which coded for proteins of a putative secretory nature. 相似文献
76.
77.
78.
Michael Untch Bernd Gerber Nadia Harbeck Christian Jackisch Norbert Marschner Volker M?bus Gunter von Minckwitz Sibylle Loibl Matthias W. Beckmann Jens-Uwe Blohmer Serban-Dan Costa Thomas Decker Ingo Diel Thomas Dimpfl Wolfgang Eiermann Tanja Fehm Klaus Friese Fritz J?nicke Wolfgang Janni Walter Jonat Marion Kiechle Uwe K?hler Hans-Joachim Lück Nicolai Maass Kurt Possinger Achim Rody Anton Scharl Andreas Schneeweiss Christoph Thomssen Diethelm Wallwiener Anja Welt 《Breast care (Basel, Switzerland)》2013,8(3):221-229
Zusammenfassung
Alle zwei Jahre findet in St. Gallen (Schweiz) die internationale Konsensuskonferenz zur Behandlung des primären Mammakarzinoms statt. Da sich das internationale Panel in St. Gallen aus Experten unterschiedlicher Länder zusammensetzt, spiegelt der Konsensus ein internationales Meinungsbild wider. Vor diesem Hintergrund erscheint es aus deutscher Sicht sinnvoll, die Abstimmungsergebnisse für den Therapiealltag in Deutschland zu konkretisieren. Eine deutsche Arbeitsgruppe mit acht Brustkrebsexperten, von denen zwei Mitglieder des internationalen St. Gallen-Panels sind, hat daher die Abstimmungsergebnisse der St. Gallen-Konsensuskonferenz (2013) für den Klinikalltag in Deutschland kommentiert. Inhaltliche Schwerpunkte der diesjährigen St. Gallen-Konferenz waren operative Fragestellungen der Brust und der Axilla, strahlentherapeutische und systemische Therapieoptionen sowie die klinische Relevanz der Tumorbiologie. Intensiv diskutiert wurde der klinische Einsatz von Multigen-Assays, inkl. ihrer Bedeutung für die individuelle Therapieentscheidung. 相似文献79.
David S. Knopman MD Clifford R. Jack Jr MD Heather J. Wiste BA Stephen D. Weigand MS Prashanthi Vemuri PhD Val J. Lowe MD Kejal Kantarci MD Jeffrey L. Gunter PhD Matthew L. Senjem MS Michelle M. Mielke PhD Rosebud O. Roberts MBBCh Bradley F. Boeve MD Ronald C. Petersen MD PhD 《Annals of neurology》2013,73(4):472-480
80.
Anja Dessauvagie Hoang-Minh Dang Tuyet Truong Thu Nguyen Bich Hong Nguyen Huong Cao Socheata Kim Gunter Groen 《International Journal of Mental Health Promotion, The》2022,24(3):439-456
Mental health literacy (MHL) refers to knowledge and attitudes that shape the recognition, management, and prevention of mental disorders. While the topic has been exhaustively researched in Western countries, research from Southeast Asia still is limited. Previous studies in this field showed a moderate recognition of mental disorders, a high prevalence of stigmatizing attitudes and a low willingness to seek professional help among Southeastern-Asian populations. This study explored the level of MHL among university students from different parts of Vietnam and Cambodia. Correlations with influencing factors (gender, age, study year, educational attainment of the parents, urban/rural origin, ethnicity, personal experiences with mental disorders) were also explored. An online survey, using a 30-item Vietnamese version of the Mental Health Literacy Scale (MHLS), was conducted at six university sites in Vietnam and Cambodia. Data of 1032 students from different study branches were included. The MHL of Vietnamese and Cambodian university students was lower, compared to samples from Australia or the UK. Females and students with a personal experience of mental disorders (self or family) showed a significantly higher MHL. No differences in MHL were found between students from different socioeconomic backgrounds (professional attainment of parents, urban/rural origin). Findings on the influence of ethnicity were inconclusive. MHL needs to be improved among the university students of Vietnam and Cambodia. Mental health promotion should specifically target male students, students from STEM branches, and international students. 相似文献