全文获取类型
收费全文 | 1295篇 |
免费 | 103篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 68篇 |
妇产科学 | 37篇 |
基础医学 | 148篇 |
口腔科学 | 13篇 |
临床医学 | 194篇 |
内科学 | 243篇 |
皮肤病学 | 64篇 |
神经病学 | 117篇 |
特种医学 | 32篇 |
外科学 | 101篇 |
综合类 | 7篇 |
一般理论 | 2篇 |
预防医学 | 136篇 |
眼科学 | 13篇 |
药学 | 75篇 |
肿瘤学 | 143篇 |
出版年
2023年 | 12篇 |
2022年 | 13篇 |
2021年 | 32篇 |
2020年 | 26篇 |
2019年 | 44篇 |
2018年 | 50篇 |
2017年 | 33篇 |
2016年 | 41篇 |
2015年 | 49篇 |
2014年 | 51篇 |
2013年 | 68篇 |
2012年 | 96篇 |
2011年 | 94篇 |
2010年 | 56篇 |
2009年 | 55篇 |
2008年 | 78篇 |
2007年 | 98篇 |
2006年 | 79篇 |
2005年 | 60篇 |
2004年 | 70篇 |
2003年 | 75篇 |
2002年 | 66篇 |
2001年 | 9篇 |
2000年 | 9篇 |
1999年 | 13篇 |
1998年 | 14篇 |
1997年 | 16篇 |
1996年 | 10篇 |
1995年 | 2篇 |
1993年 | 8篇 |
1992年 | 5篇 |
1991年 | 6篇 |
1989年 | 2篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1982年 | 6篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1976年 | 4篇 |
1975年 | 5篇 |
1972年 | 2篇 |
1940年 | 2篇 |
1938年 | 2篇 |
1935年 | 1篇 |
1932年 | 1篇 |
1931年 | 2篇 |
排序方式: 共有1403条查询结果,搜索用时 281 毫秒
11.
Maynard C Cox GB Krupski A Stark K 《The journal of behavioral health services & research》1999,26(2):219-228
Little is known about outcomes of treatment for individuals with mental illness and chemical dependencies. This article compares services utilization preadmission and postdischarge in 534 patients discharged from a residential treatment program in Washington State. A number of services, including chemical dependency detoxification, mental health crisis, inpatient psychiatric, medical emergency, and general medical inpatient hospitalization, were used less frequently in the period after discharge. The total reimbursement for all Medicaid services decreased by 44% from $5 million in the year prior to discharge to $2.8 million in the year after discharge. Also, individuals (32%) who completed the program were less likely to use costly, acute care services. This study was limited by the absence of a control group and posttreatment alcohol and drug use data. In addition, other unmeasured factors could have explained the association between program completion and better outcomes. 相似文献
12.
Olson RE Sielecki TM Wityak J Pinto DJ Batt DG Frietze WE Liu J Tobin AE Orwat MJ Di Meo SV Houghton GC Lalka GK Mousa SA Racanelli AL Hausner EA Kapil RP Rabel SR Thoolen MJ Reilly TM Anderson PS Wexler RR 《Journal of medicinal chemistry》1999,42(7):1178-1192
Modification of the alpha-carbamate substituent of isoxazoline GPIIb/IIIa (alphaIIb beta3) antagonist DMP 754 (7) led to a series of alpha-sulfonamide and alpha-sulfamide diaminopropionate isoxazolinylacetamides which were found to be potent inhibitors of in vitro platelet aggregation. Aryl- and heteroaryl-alpha-sulfonamide groups, in conjunction with (5R)-isoxazoline (2S)-diaminopropionate stereochemistry, were found to impart a pronounced duration of antiplatelet effect in dogs, potentially due to high affinity for unactivated platelets. Isoxazolylsulfonamide 34b (DMP 802), a highly selective GPIIb/IIIa antagonist, demonstrated a prolonged duration of action after iv and po dosing and high affinity for resting and activated platelets. The prolonged antiplatelet profile of DMP 802 in dogs and the high affinity of DMP 802 for human platelets may be predictive of clinical utility as a once-daily antiplatelet agent. 相似文献
13.
Antoinette R Tan Xiaowei Yang Stephen M Hewitt Arlene Berman Erin R Lepper Alex Sparreboom Allyson L Parr William D Figg Catherine Chow Seth M Steinberg Stephen L Bacharach Millie Whatley Jorge A Carrasquillo Jaime S Brahim Seth A Ettenberg Stan Lipkowitz Sandra M Swain 《Journal of clinical oncology》2004,22(15):3080-3090
PURPOSE: To evaluate changes in epidermal growth factor receptor (EGFR) phosphorylation and its downstream signaling in tumor and surrogate tissue biopsies in patients with metastatic breast cancer treated with erlotinib, an EGFR tyrosine kinase inhibitor, and to assess relationships between biomarkers in tumor and normal tissues and between biomarkers and pharmacokinetics. PATIENTS AND METHODS: Eighteen patients were treated orally with 150 mg/d of erlotinib. Ki67, EGFR, phosphorylated EGFR (pEGFR), phosphorylated mitogen-activated protein kinase (pMAPK), and phosphorylated AKT (pAKT) in 15 paired tumor, skin, and buccal mucosa biopsies (at baseline and after 1 month of therapy) were examined by immunohistochemistry and analyzed quantitatively. Pharmacokinetic sampling was also obtained. RESULTS: The stratum corneum layer and Ki67 in keratinocytes of the epidermis in 15 paired skin biopsies significantly decreased after treatment (P = .0005 and P = .0003, respectively). No significant change in Ki67 was detected in 15 tumors, and no responses were observed. One was EGFR-positive and displayed heterogeneous expression of the receptor, and 14 were EGFR-negative. In the EGFR-positive tumor, pEGFR, pMAPK, and pAKT were reduced after treatment. Paradoxically, pEGFR was increased in EGFR-negative tumors post-treatment (P = .001). Although markers were reduced in surrogate and tumor tissues in the patient with EGFR-positive tumor, no apparent associations were observed in patients with EGFR-negative tumor. CONCLUSION: Erlotinib has inhibitory biologic effects on normal surrogate tissues and on an EGFR-positive tumor. The lack of reduced tumor proliferation may be attributed to the heterogeneous expression of receptor in the EGFR-positive patient and absence of target in this cohort of heavily pretreated patients. 相似文献
14.
15.
16.
Juan P. Cata Acsa M. Zavala Antoinette Van Meter Uduak U. Williams Jose Soliz Mike Hernandez 《International journal of hyperthermia》2018,34(5):538-544
Background: Acute kidney injury (AKI) is a postoperative complication associated with significant morbidity and mortality. The incidence and risks factors for AKI after cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (CRS-HIPEC) have not been fully studied. The purpose of this study was to identify perioperative risk factors predictive of AKI after CRS-HIPEC.Methods: This retrospective study collected demographic, tumour-related, intraoperative and postoperative data from 475 patients who underwent CRS-HIPECs. AKI was defined using the acute kidney injury network criteria and calculated on postoperative days 1, 2, 3, 7 and day of hospital discharge. We conducted univariate and multivariate analyses to assess the association between variables of interest and AKI. A p value of <0.05 was considered statistically significant.Results: The incidence of AKI was 21.3%. The multivariate analysis identified six predictor factors independently associated with the development of AKI (OR: [95%CI]); age: 1.16 (1.05–1.29, p?0.005), BMI (overweight: 1.97 [1.00–3.88], p?=?0.05) and obesity: 2.88 (1.47–5.63), p?0.002)), preoperative pregabalin: 3.04 (1.71–5.39, p?0.037), platinum-based infusion: 3.04 (1.71–5.39, p?0.001) and EBL: 1.77 (1.27–2.47, p?0.001). Splenectomy had a protective effect (OR: 0.44 (0.25–0.76, p?0.003).Conclusions: Our study demonstrates that the incidence of AKI is high. While other studies have reported that AKI is associated with platinum-based infusion, age and obesity, we report for the first time a negative association between pregabalin use and AKI. More studies are needed to confirm our results. 相似文献
17.
18.
Antoinette Falconi‐McCahill 《Journal of Midwifery & Women's Health》2019,64(5):578-591
Bacterial vaginosis is a prevalent vaginal infection that affects women of all ages. Presenting symptoms include a vaginal discharge that is thin and white and has a fishy odor. This infection is associated with the acquisition of other sexually transmitted infections as well as premature labor and preterm birth. Recurrence rates after treatment are high, and medication adverse effects are common, leading many women to seek alternative therapies to manage and prevent recurrence. Many of these treatments are searchable online, and ingredients are easily obtainable. The purpose of this article is to review the state of the science regarding the safety and efficacy of alternative therapies for the treatment of bacterial vaginosis in nonpregnant women. 相似文献
19.