全文获取类型
收费全文 | 188940篇 |
免费 | 1699篇 |
国内免费 | 76篇 |
专业分类
耳鼻咽喉 | 1233篇 |
儿科学 | 6967篇 |
妇产科学 | 3179篇 |
基础医学 | 18713篇 |
口腔科学 | 1813篇 |
临床医学 | 13428篇 |
内科学 | 33557篇 |
皮肤病学 | 1112篇 |
神经病学 | 17923篇 |
特种医学 | 9458篇 |
外科学 | 30739篇 |
综合类 | 2358篇 |
一般理论 | 7篇 |
预防医学 | 18733篇 |
眼科学 | 3182篇 |
药学 | 10422篇 |
中国医学 | 639篇 |
肿瘤学 | 17252篇 |
出版年
2023年 | 74篇 |
2022年 | 57篇 |
2021年 | 183篇 |
2020年 | 168篇 |
2019年 | 221篇 |
2018年 | 22152篇 |
2017年 | 17574篇 |
2016年 | 19757篇 |
2015年 | 1207篇 |
2014年 | 1247篇 |
2013年 | 1283篇 |
2012年 | 7774篇 |
2011年 | 21797篇 |
2010年 | 19366篇 |
2009年 | 11997篇 |
2008年 | 20369篇 |
2007年 | 22603篇 |
2006年 | 1535篇 |
2005年 | 3184篇 |
2004年 | 4276篇 |
2003年 | 5179篇 |
2002年 | 3301篇 |
2001年 | 516篇 |
2000年 | 568篇 |
1999年 | 359篇 |
1998年 | 366篇 |
1997年 | 328篇 |
1996年 | 199篇 |
1995年 | 220篇 |
1994年 | 180篇 |
1993年 | 164篇 |
1992年 | 116篇 |
1991年 | 166篇 |
1990年 | 203篇 |
1989年 | 152篇 |
1988年 | 148篇 |
1987年 | 109篇 |
1986年 | 89篇 |
1985年 | 90篇 |
1984年 | 73篇 |
1983年 | 78篇 |
1982年 | 92篇 |
1980年 | 84篇 |
1978年 | 50篇 |
1977年 | 45篇 |
1976年 | 47篇 |
1974年 | 58篇 |
1938年 | 63篇 |
1932年 | 64篇 |
1930年 | 50篇 |
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
1.
Matthias Knefel PhD Elisabeth L. Zeilinger PhD Simone Lubowitzki PhD Katharina Krammer MSc Matthias Unseld MD Rupert Bartsch MD Thorsten Fuereder MD Ulrich Jäger MD Barbara Kiesewetter MD Maria Krauth MD Markus Raderer MD Philipp B. Staber MD Peter Valent MD Alexander Gaiger MD 《Cancer》2023,129(21):3466-3475
Background
Survival in cancer patients is associated with a multitude of biological, social, and psychological factors. Although it is well established that all these factors add to overall mortality, it is not well understood how the predictive power of these parameters changes in a comprehensive model and over time.Methods
Patients who attended the authors’ outpatient clinic were invited to participate. The authors followed 5180 mixed cancer patients (51.1% female; mean age, 59.1 years [SD = 13.8]) for up to 16 years and analyzed biological (age, sex, cancer site, anemia), psychological (anxiety, depression), and social variables (marital status, education, employment status) potentially predicting overall survival in a Cox proportional hazards model.Results
The median survival time for the entire sample was 4.3 years (95% confidence interval, 4.0–4.7). The overall survival probabilities for 1 and 10 years were 76.8% and 38.0%, respectively. Following an empirical approach, the authors split the time interval into five periods: acute, subacute, short-term, medium-term, and long-term. A complex pattern of variables predicted overall survival differently in the five periods. Biological parameters were important throughout most of the time, social parameters were either time-independent predictors or tended to be more important in the longer term. Of the psychological parameters, only depression was a significant predictor and lost its predictive power in the long-term.Conclusions
The findings of this study allow the development of comprehensive patient-specific models of risk and resilience factors addressing biopsychosocial needs of cancer patients, paving the way for a personalized treatment plan that goes beyond biomedical cancer care. 相似文献2.
3.
Rosdali Y. Diaz Coronado MD Martin Mynarek MD Christian Koelsche MD Pamela Mora Alferez MD Sandro Casavilca Zambrano MD Antonio Wachtel Aptowitzer MD Felix Sahm MD Andreas von Deimling MD Ulrich Schüller MD Michael Spohn MSc Dominik Sturm MD Stefan M. Pfister MD Andres Morales La Madrid MD Raymundo Sernaque Quintana MD Gustavo Sarria Bardales MD Tatiana Negreiros Chinchihuara MD Luis Ojeda Medina MD Pamela Garcia-Corrochano Medina MD Danny A. Campos Sanchez MD Jimena Ponce Farfan MD Stefan Rutkowski MD Juan L. Garcia Leon MD 《Cancer》2022,128(4):697-707
4.
Michael Mark Dirk Klingbiel Ulrich Mey Ralph Winterhalder Christian Rothermundt Silke Gillessen Roger von Moos Michael Pollak Gabriela Manetsch Räto Strebel Richard Cathomas 《Clinical genitourinary cancer》2019,17(2):e323-e328
Background
There is evidence linking metformin to improved prostate cancer–related outcomes.Patients and Methods
Twenty-five men with metastatic castration-resistant prostate cancer and prostate-specific antigen (PSA) progression while receiving treatment with abiraterone from 3 Swiss centers were included in this single-arm phase 2 trial between November 2013 and September 2016. Metformin was added to abiraterone continuously at 1000 mg twice daily in uninterrupted 4-week cycles. The primary end point was the absence of disease progression at 12 weeks (PFS12). The Fleming single-stage design was applied. With a 5% significance level and 80% power, 25 patients were required to test PFS12 ≤ 15% (H0) compared to ≥ 35% (H1). Secondary end points included toxicity and safety issues. The study was registered at ClinicalTrials.gov (NCT01677897).Results
The primary end point PFS12 was 12% (3 of 25 patients) (95% confidence interval, 3-31). Most patients had PSA progression, almost half had radiographic progression, but only 1 patient had symptomatic progression. Eleven (44%) of 25 patients had grade 1 and 2 patients each grade 2 (8%) or grade 3 (8%) gastrointestinal toxicity (nausea, diarrhea, loss of appetite). One patient discontinued treatment at week 5 because of intolerable grade 3 diarrhea.Conclusion
The addition of metformin to abiraterone for patients with metastatic castration-resistant prostate cancer and PSA progression while receiving abiraterone therapy does not affect further progression and has no meaningful clinical benefit. A higher-than-expected gastrointestinal toxicity attributed to metformin was observed. 相似文献5.
Nickel Ann-Christin Wan Xue-Yan Saban Dino-Vitali Weng Yin-Lun Zhang Shu Keyvani Kathy Sure Ulrich Zhu Yuan 《Journal of neuro-oncology》2019,141(1):31-41
Journal of Neuro-Oncology - Glioblastoma (GBM) is one of the most aggressive and incurable primary brain tumors. Identification of novel therapeutic targets is an urgent priority. Programmed cell... 相似文献
6.
Caroline Himbert Jennifer Ose Tengda Lin Christy A. Warby Biljana Gigic Karen Steindorf Petra Schrotz‐King Clare Abbenhardt‐Martin Lin Zielske Juergen Boehm Cornelia M. Ulrich 《European journal of cancer care》2019,28(4)
Cancer‐related fatigue is one of the most common side effects of colorectal cancer treatment and is affected by biomedical factors. We investigated the association of inflammation‐ and angiogenesis‐related biomarkers with cancer‐related fatigue. Pre‐surgery (baseline) serum samples were obtained from n = 236 newly diagnosed colorectal cancer patients. Meso Scale Discovery assays were performed to measure levels of biomarkers for inflammation and angiogenesis (CRP, SAA, IL‐6, IL‐8, MCP‐1, sICAM‐1, sVCAM‐1, TNFα, VEGFA and VEGFD). Cancer‐related fatigue was assessed with the EORTC QLQ‐30 questionnaire at baseline and 6 and 12 months post‐surgery. We tested associations using Spearman's partial correlations and logistic regression analyses, adjusting for age, sex and body mass index. sICAM‐1 and VEGFD showed a significant positive correlation with cancer‐related fatigue at baseline and 6‐, and 12‐month follow‐up (sICAM‐1: r = 0.19, p = 0.010; r = 0.24, p = 0.004; r = 0.25, p = 0.006; VEGFD: r = 0.20, p = 0.006; r = 0.15, p = 0.06; r = 0.23, p = 0.01 respectively). Biomarkers of inflammation and angiogenesis measured prior to surgery are associated with cancer‐related fatigue in colorectal cancer patients throughout various time points. Our results suggest the involvement of overexpressed sICAM‐1 and VEGFD in the development of fatigue. 相似文献
7.
8.
Maurer Elke Maurer Michael Stöckle Ulrich Flesch Ingo Ateschrang Atesch Kraus Tobias M. 《Der Unfallchirurg》2019,122(11):905-910
Die Unfallchirurgie - Der folgende Artikel präsentiert den Fall eines 53-jährigen Patienten, gebürtig in Sri Lanka, der sich zunächst mit dem Verdacht auf ein Kniegelenkempyem... 相似文献
9.
Tobias R. Spiller Belinda J. Liddell Matthis Schick Naser Morina Ulrich Schnyder Monique Pfaltz Richard A. Bryant Angela Nickerson 《Journal of traumatic stress》2019,32(1):32-41
Refugees who suffer from posttraumatic stress disorder (PTSD) often react with strong emotions when confronted with trauma reminders. In this study, we aimed to investigate the associations between low emotion regulation capacity (as indexed by low heart rate variability [HRV]), probable PTSD diagnosis, and fear and anger reaction and recovery to trauma‐related stimuli. Participants were 81 trauma‐exposed refugees (probable PTSD, n = 23; trauma‐exposed controls, n = 58). The experiment comprised three 5‐min phases: a resting phase (baseline); an exposition phase, during which participants were exposed to trauma‐related images (stimulus); and another resting phase (recovery). We assessed HRV at baseline, and fear and anger were rated at the end of each phase. Linear mixed model analyses were used to investigate the associations between baseline HRV and probable DSM‐5 PTSD diagnosis in influencing anger and fear responses both immediately after viewing trauma‐related stimuli and at the end of the recovery phase. Compared to controls, participants with probable PTSD showed a greater increase in fear from baseline to stimulus presentation, d = 0.606. Compared to participants with low emotion regulation capacity, participants with high emotion regulation capacity showed a smaller reduction in anger from stimulus presentation to recovery, d = 0.548. Our findings indicated that following exposure to trauma‐related stimuli, probable PTSD diagnosis predicted increased fear reactivity, and low emotion regulation capacity predicted decreased anger recovery. Impaired anger recovery following trauma reminders in the context of low emotion regulation capacity might contribute to the increased levels of anger found in postconflict samples. 相似文献
10.
Otte Marie-Luise Schmitgen Mike M. Kubera Katharina M. Wolf Nadine D. Fritze Stefan Geiger Lena S. Tost Heike Seidl Ulrich W. Meyer-Lindenberg Andreas Hirjak Dusan Wolf Robert C. 《European archives of psychiatry and clinical neuroscience》2022,272(6):985-995
European Archives of Psychiatry and Clinical Neuroscience - Insight into illness in schizophrenia (SZ) patients has a major impact on treatment adherence and outcome. Previous studies have linked... 相似文献