全文获取类型
收费全文 | 1834篇 |
免费 | 152篇 |
国内免费 | 52篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 120篇 |
妇产科学 | 33篇 |
基础医学 | 249篇 |
口腔科学 | 40篇 |
临床医学 | 230篇 |
内科学 | 346篇 |
皮肤病学 | 28篇 |
神经病学 | 160篇 |
特种医学 | 228篇 |
外国民族医学 | 3篇 |
外科学 | 202篇 |
综合类 | 48篇 |
预防医学 | 91篇 |
眼科学 | 17篇 |
药学 | 107篇 |
1篇 | |
中国医学 | 10篇 |
肿瘤学 | 113篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 13篇 |
2021年 | 38篇 |
2020年 | 32篇 |
2019年 | 25篇 |
2018年 | 46篇 |
2017年 | 34篇 |
2016年 | 52篇 |
2015年 | 63篇 |
2014年 | 78篇 |
2013年 | 90篇 |
2012年 | 95篇 |
2011年 | 97篇 |
2010年 | 85篇 |
2009年 | 106篇 |
2008年 | 68篇 |
2007年 | 91篇 |
2006年 | 57篇 |
2005年 | 76篇 |
2004年 | 55篇 |
2003年 | 50篇 |
2002年 | 40篇 |
2001年 | 36篇 |
2000年 | 33篇 |
1999年 | 34篇 |
1998年 | 81篇 |
1997年 | 87篇 |
1996年 | 62篇 |
1995年 | 58篇 |
1994年 | 39篇 |
1993年 | 45篇 |
1992年 | 23篇 |
1991年 | 11篇 |
1990年 | 13篇 |
1989年 | 31篇 |
1988年 | 26篇 |
1987年 | 29篇 |
1986年 | 18篇 |
1985年 | 17篇 |
1984年 | 12篇 |
1983年 | 12篇 |
1982年 | 11篇 |
1981年 | 8篇 |
1980年 | 10篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 11篇 |
1976年 | 5篇 |
1975年 | 2篇 |
排序方式: 共有2038条查询结果,搜索用时 0 毫秒
91.
Sejong Chun Eun-Young Kim Seung-Yeon Cha Ji-Young Seo Hong Hoe Koo Duck Cho 《Transfusion and apheresis science》2017,56(3):427-430
While a portable microscopic cell counter has been evaluated to enumerate residual white blood cells (WBCs) in red blood cells and platelet concentrates at blood centers, it has not yet been assessed in a hospital blood bank. We investigated the performance of this device and evaluated its accuracy, along with its benefits in time management.Residual WBCs from each of 100 apheresis platelet specimens were measured manually using a Nageotte chamber, along with flow cytometry methods and an ADAM-rWBC automated instrument (NanoEnTek, Seoul, South Korea). The efficiency was calculated by measuring the time required for the analysis of one specimen ten times consecutively.Flow cytometry and the ADAM-rWBC were able to detect four sporadic cases that had residual WBCs exceeding 1/μL that were not detected by the manual method. Analysis time was the shortest with the ADAM-rWBC, followed by flow cytometry and the manual method.Our data suggest that hospital blood banks require quality control of residual WBCs; among the methods evaluated in this study, the portable microscopic cell counter offers the best time efficiency. 相似文献
92.
The aim of this study was to investigate the significance of serum prostate-specific antigen (PSA) value adjusted for total tumor volume (PSA/tumor volume) and serum PSA value adjusted for non-cancerous prostate tissue volume (NCPV) (PSA/NCPV) as a predictor of pathological findings and clinical outcome after radical prostatectomy. Clinical and pathological data of 407 patients (median age: 66.5 years; range: 41.8-85.7 years) were reviewed retrospectively. The median follow-up period was 18.1 months (range: 1.0-107.8 months). Biochemical recurrence was defined as detectable PSA levels (greater than 0.2 ng ml(-1)) and the time of biochemical recurrence was taken to be the first time PSA became detectable. In the multivariate model, PSA/NCPV was an independent predictor of extracapsular extension and positive surgical margin (P<0.05), but PSA/tumor volume was not. Kaplan-Meier curves revealed that PSA/NCPV correlated with biochemical recurrence-free survival (P<0.001; log-rank test) but PSA/tumor volume did not (P=0.275; log-rank test). PSA/NCPV was also a significant independent prognostic factor for biochemical recurrence-free survival on multivariate Cox proportional hazard analysis (P=0.004, relative risk=2.42). Our findings suggest that PSA/NCPV is associated independently with extracapsular extension and surgical margin status and may be an independent prognostic variable of PSA recurrence after radical prostatectomy. 相似文献
93.
94.
Hyoung Jin Kang Keon Hee Yoo Ji Won Lee Hyery Kim Soo Hyun Lee Ki Woong Sung Kyung Duk Park Hong Hoe Koo Hee Young Shin Hyo Seop Ahn 《Annals of hematology》2010,89(10):1035-1044
Umbilical cord blood transplantation (UCBT) with two units has been conducted with promising results in adults to overcome
the limitation of low cell numbers. In an attempt to improve the outcomes, double UCBT was performed in children and adolescents.
Sixty-one patients, including 44 acute leukemia, and 17 other hematologic diseases, received double UCBT. Donor-type engraftment
achieved in 82% of patients. Except one patient with persistent mixed chimerism of two units, other 49 patients showed dominancy
of one unit and only the CFU-GM was significant factor influencing dominancy. The event-free survival (EFS) of leukemia and
other hematologic disease were 59% and 53%, respectively, and the EFS of acute leukemia patients who received transplant in
first or second CR (68.6%) was significantly better than in those with advanced disease (22.2%) (P = 0.007). Among the factors influencing outcomes, low cell dose difference between two units (TNC difference/TNC of large
unit <15%) were associated with higher TRM, relapse, and lower EFS. Double UCBT was a promising modality of transplant in
children and adolescence. However, engraftment and other results were not so satisfactory yet. To improve the outcomes, development
of new selection guideline, probably including cell dose difference between two units and technology to enhance engraftment
and reduce transplantation-related mortality are warranted. 相似文献
95.
Jae Young Park Juhyun Park Ja Hyeon Ku Hyeon Hoe Kim 《Journal of Korean medical science》2009,24(5):992-994
A 70-yr-old man presented with painless gross hematuria. He underwent right nephrectomy for benign disease 9 yr ago. Computed tomography and cystoscopy showed a mass in the distal region of the right ureteral stump. He underwent right ureterectomy and bladder cuff resection. Pathological examination showed T1 and WHO grade 2 transitional cell carcinoma. At 6 months postoperatively, the patient is alive without any evidence of recurrence. 相似文献
96.
97.
98.
99.
Cleusa P Ferri Sandro S Mitsuhiro Marina CM Barros Elisa Chalem Ruth Guinsburg Vikram Patel Martin Prince Ronaldo Laranjeira 《BMC public health》2007,7(1):209
Background
Both violence and depression during pregnancy have been linked to adverse neonatal outcomes, particularly low birth weight. The aim of this study was to investigate the independent and interactive effects of these maternal exposures upon neonatal outcomes among pregnant adolescents in a disadvantaged population from Sao Paulo, Brazil. 相似文献100.
Savas M. Menticoglou MD CM Frank A. Manning MD Ian Morrison MB Chris R. Harman MD 《The Australian & New Zealand journal of obstetrics & gynaecology》1992,32(2):100-103
Because difficult vaginal delivery is more frequent with macrosomic fetuses, some writers recommend routine Caesarean section for the delivery of fetuses greater than or equal to 4,500 g. The purpose of this study was to evaluate the appropriateness of this recommendation. A retrospective review was undertaken to determine how many fetuses born in our hospital weighing greater than or equal to 4,500 g died or were permanently damaged as a consequence of mechanical difficulties at delivery. During a 10-year period, 590 (75%) of 786 cephalic babies weighing greater than or equal to 4,500 g and alive at the start of labour were born vaginally. No baby died or was permanently damaged as a consequence of mechanical difficulties at delivery. Routine Caesarean section for macrosomic fetuses to prevent death or damage from difficult delivery is not warranted by our results. 相似文献