全文获取类型
收费全文 | 8942篇 |
免费 | 846篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 271篇 |
妇产科学 | 234篇 |
基础医学 | 1193篇 |
口腔科学 | 204篇 |
临床医学 | 1206篇 |
内科学 | 1588篇 |
皮肤病学 | 98篇 |
神经病学 | 855篇 |
特种医学 | 190篇 |
外科学 | 1215篇 |
综合类 | 204篇 |
一般理论 | 13篇 |
预防医学 | 1128篇 |
眼科学 | 174篇 |
药学 | 612篇 |
中国医学 | 10篇 |
肿瘤学 | 535篇 |
出版年
2023年 | 97篇 |
2022年 | 63篇 |
2021年 | 278篇 |
2020年 | 225篇 |
2019年 | 306篇 |
2018年 | 317篇 |
2017年 | 253篇 |
2016年 | 231篇 |
2015年 | 239篇 |
2014年 | 337篇 |
2013年 | 418篇 |
2012年 | 636篇 |
2011年 | 649篇 |
2010年 | 314篇 |
2009年 | 250篇 |
2008年 | 475篇 |
2007年 | 432篇 |
2006年 | 382篇 |
2005年 | 375篇 |
2004年 | 340篇 |
2003年 | 297篇 |
2002年 | 286篇 |
2001年 | 147篇 |
2000年 | 146篇 |
1999年 | 145篇 |
1998年 | 46篇 |
1996年 | 43篇 |
1995年 | 44篇 |
1994年 | 48篇 |
1992年 | 123篇 |
1991年 | 118篇 |
1990年 | 128篇 |
1989年 | 127篇 |
1988年 | 117篇 |
1987年 | 100篇 |
1986年 | 117篇 |
1985年 | 106篇 |
1984年 | 82篇 |
1983年 | 67篇 |
1982年 | 52篇 |
1981年 | 45篇 |
1980年 | 39篇 |
1979年 | 63篇 |
1978年 | 54篇 |
1976年 | 47篇 |
1974年 | 42篇 |
1973年 | 51篇 |
1972年 | 39篇 |
1969年 | 44篇 |
1967年 | 38篇 |
排序方式: 共有9798条查询结果,搜索用时 125 毫秒
1.
Victoria L. Parker Matthew C. Winter John A. Tidy Barry W. Hancock Julia E. Palmer Naveed Sarwar Baljeet Kaur Katie McDonald Xianne Aguiar Kamaljit Singh Nick Unsworth Imran Jabbar Allan A. Pacey Robert F. Harrison Michael J. Seckl 《International journal of cancer. Journal international du cancer》2023,152(5):986-997
Gestational trophoblastic neoplasia (GTN) patients are treated according to the eight-variable International Federation of Gynaecology and Obstetrics (FIGO) scoring system, that aims to predict first-line single-agent chemotherapy resistance. FIGO is imperfect with one-third of low-risk patients developing disease resistance to first-line single-agent chemotherapy. We aimed to generate simplified models that improve upon FIGO. Logistic regression (LR) and multilayer perceptron (MLP) modelling (n = 4191) generated six models (M1-6). M1, all eight FIGO variables (scored data); M2, all eight FIGO variables (scored and raw data); M3, nonimaging variables (scored data); M4, nonimaging variables (scored and raw data); M5, imaging variables (scored data); and M6, pretreatment hCG (raw data) + imaging variables (scored data). Performance was compared to FIGO using true and false positive rates, positive and negative predictive values, diagnostic odds ratio, receiver operating characteristic (ROC) curves, Bland-Altman calibration plots, decision curve analysis and contingency tables. M1-6 were calibrated and outperformed FIGO on true positive rate and positive predictive value. Using LR and MLP, M1, M2 and M4 generated small improvements to the ROC curve and decision curve analysis. M3, M5 and M6 matched FIGO or performed less well. Compared to FIGO, most (excluding LR M4 and MLP M5) had significant discordance in patient classification (McNemar's test P < .05); 55-112 undertreated, 46-206 overtreated. Statistical modelling yielded only small gains over FIGO performance, arising through recategorisation of treatment-resistant patients, with a significant proportion of under/overtreatment as the available data have been used a priori to allocate primary chemotherapy. Streamlining FIGO should now be the focus. 相似文献
2.
Katie Mycock Lin Zhan Gavin Taylor-Stokes Gary Milligan Debanjali Mitra 《Current oncology (Toronto, Ont.)》2021,28(1):678
Background: Palbociclib is a selective cyclin-dependent kinase (CDK) 4/6 inhibitor used in combination with aromatase inhibitors or fulvestrant for patients with hormone receptor-positive (HR+) human epidermal growth factor receptor 2 (HER2)-negative advanced/metastatic breast cancer (ABC/MBC). Palbociclib was the first CDK 4/6 inhibitor approved for HR+/HER2− ABC/MBC treatment in Canada in combination with letrozole (P+L) as an initial endocrine-based therapy (approved March 2016), or with fulvestrant (P+F) following disease progression after prior endocrine therapy (approved May 2017). The Ibrance Real World Insights (IRIS) study () collected real-world outcomes data for palbociclib-treated patients in several countries, including Canada. Methods: This retrospective chart review included women with HR+/HER2− ABC/MBC receiving P+L or P+F in Canada. Physicians reviewed medical records for up to 14 patients, abstracting demographic and clinical characteristics, treatment patterns, and clinical outcomes. Progression-free rates (PFRs) and survival rates (SRs) at 6, 12, 18, and 24 months were estimated via Kaplan–Meier analysis. Results: Thirty-three physicians examined medical records for 247 patients (P+L, n = 214; P+F, n = 33). Median follow-up was 8.8 months for P+L and 7.0 months for P+F. Most patients were initiated on palbociclib 125 mg/d (P+L, 90.2%; P+F, 84.8%). Doses were reduced in 16.6% of P+L and 14.3% of P+F patients initiating palbociclib at 125 mg/d. The PFR for P+L was 90.3% at 12 months and 78.2% at 18 months; corresponding SRs were 95.6% and 93.0%. For P+F, 6-month PFR was 91.0%; 12-month SR was 100.0%. Conclusions: Dose reduction rates were low and PFR and SR were high in this Canadian real-world assessment of P+L and P+F treatments, suggesting that palbociclib combinations are well tolerated and effective. NCT03159195相似文献
3.
4.
5.
Combs Katie Massey Buckley Pamela R. Lain Marion Amanda Drewelow Karen M. Urano Grace Kerns Suzanne E. U. 《Prevention science》2022,23(6):969-981
Prevention Science - As evidence-based interventions (EBIs) become more widely disseminated, fidelity of implementation (FOI) often wanes. This study explores the association between FOI and... 相似文献
6.
Harry Jin Arjee Restar Katie Biello Lisa Kuhns Sari Reisner Robert Garofalo 《AIDS care》2019,31(1):125-130
Young transgender women (YTW) are disproportionately affected by HIV, however, little is known about the factors associated with HIV infection and treatment engagement. We examined correlates of HIV infection and the steps of the HIV treatment cascade, specifically, being aware of their HIV infection, linked to care, on ART, and adherent to ART. We analyzed the baseline data of Project LifeSkills, a randomized control trial of sexually active YTW recruited from Chicago, Illinois and Boston, Massachusetts. We conducted multivariable Poisson regressions to evaluate correlates of HIV infection and the steps of the HIV treatment cascade. Nearly a quarter (24.7%) of YTW were HIV-infected. Among HIV-infected YTW, 86.2% were aware of their HIV status, 72.3% were linked to care, 56.9% were on ART, and 46.2% were adherent to ART. Having avoided healthcare due to cost in the past 12 months and not having a primary care provider were associated with suboptimal engagement in HIV care. Our results suggest that improving linkage and retention in care by addressing financial barriers and improving access to primary care providers could significantly improve health outcomes of YTW as well as reduce forward transmission of HIV. 相似文献
7.
8.
9.
Erik L. Frandsen Jessica Otero Joe C. Rutledge Mariska S. Kemna Erin L. Albers Borah J. Hong Yuk M. Law Joshua M. Friedland‐Little 《Pediatric transplantation》2020,24(1)
Bortezomib is approved for the treatment of multiple myeloma but increasingly used in heart transplant (HTx) recipients with antibody‐mediated rejection (AMR). Severe pulmonary toxicity is a rare complication in multiple myeloma patients treated with bortezomib, but has not been described in a solid organ transplant recipient. A 20‐year‐old man 7 years post‐HTx presented with acute rejection with hemodynamic compromise. Endomyocardial biopsy showed mixed rejection (ISHLT grade 2R‐3R acute cellular rejection (ACR) and pAMR 1 (I+) with diffuse C4d staining). Two new high MFI circulating MHC class‐II donor‐specific antibodies (DSA) were detected. Treatment included corticosteroids, antithymocyte globulin, plasmapheresis, IVIG, rituximab, and bortezomib (1.3 mg/m2). Due to rebound in DSA, a second course of bortezomib was started. Thrombocytopenia and peripheral neuropathy prompted a 50% dose reduction during the 2nd course. Shortly after the 3rd reduced dose, the patient developed hypoxemic respiratory failure. Bronchoscopy revealed pulmonary hemorrhage with negative infectious studies. Chest CT showed bilateral parenchymal disease with bronchiectasis and alveolar bleeding. Despite treatment with high‐dose steroids, severe ARDS ensued with multisystem organ failure. The patient expired 23 days after the final dose of bortezomib. Post‐mortem lung histology revealed diffuse alveolar damage, pulmonary fibrosis, and hemorrhage. Cardiac histology showed resolving/residual ACR 1R and pAMR 1 (I+). While rare, bortezomib‐induced lung toxicity (BILT) can occur in HTx recipients and can carry a high risk of mortality. Drug reaction and immediate drug withdrawal should be considered in patients who develop respiratory symptoms, though optimal management of BILT is unclear. 相似文献
10.