The distribution of ABO blood group is related to the incidence of various diseases. Gestational hypertensive disorders (GHD) is one of the most important risk factors during pregnancy, which has certain heredity. It is reported that ABO blood type is associated with the risk of GHD. However, the results are still controversial. In this study, we conducted a systematic review and meta-analysis to clarify the relationship between ABO blood group and GHD.
 
  All eligible studies come from Embase, Cochrane Library, Pubmed, Chinese databases SinoMed, Chinese National Knowledge Infrastructure, Chinese Scientific Journals Database, and Wanfang Data. The retrieval time is from the establishment of the database to March 2021. The language will be limited to Chinese and English. The 2 reviewers will be responsible for the selection of the study, the extraction of data, and the evaluation of the quality of the research. Pooled odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the corresponding associations. Sensitivity analysis, publication bias assessment, and heterogeneity test were performed using STATA 16.0.
 
  The results of this meta-analysis will be published in peer-reviewed journals.
 
  This study will provide evidence to support the relationship between ABO blood group and the risk of GHD.
 
  The private information from individuals will not be published. This systematic review also will not impair endangering participants' rights. Ethical approval is not required. The results may be published in a peer-reviewed journal or disseminated in relevant conferences.
 
  DOI 10.17605/OSF.IO/3X9YZ.
 DOI 10.17605/OSF.IO/3X9YZ.
  Prior reports have suggested that the red blood cell distribution width (RDW) parameter could be measured as a prognostic indicator in pulmonary embolism (PE) patients, thereby helping to guide their care.  https://www.selleckchem.com/products/CP-690550.html  However, no systematic analyses on this topic have been completed to date, and the exact relationship between RDW and PE remains to be fully clarified. We will therefore conduct a systematic literature review with the goal of defining the correlation between RDW and mortality in acute PE cases.
 
  The EMBASE, Web of Knowledge, PubMed, ClinicalTrials.gov, and Cochrane Library databases will be searched for all relevant studies published from inception through March 2021 using the following search strategy ("red blood cell distribution width") AND ("pulmonary embolism"). Two authors will independently identify eligible studies and extract data. The Q and I2 statistics will be used to judge heterogeneity among studies.
 
  This study will establish the relative efficacy of RDW as a metric for predicting PE patient mortality.
 
  This study will offer a reliable, evidence-based foundation for the clinical utilization of RDW as a tool for gauging mortality risk in acute PE patients.
 
  As this is a protocol for a systematic review of previously published data, no ethical approval is required. Electronic dissemination of study results will be done through a peer-review publication or represented at a related conference.
 As this is a protocol for a systematic review of previously published data, no ethical approval is required. Electronic dissemination of study results will be done through a peer-review publication or represented at a related conference.
  Cervical Spondylotic radiculopathy (CSR) is the most common spinal degenerative disease. Its clinical manifestations are pain and numbness in the neck and arm and limitation of neck movement, which greatly affects the life and work of patients. Acupuncture and electroacupuncture are commonly used in China, the efficacy of acupuncture has been confirmed. Existing evidence shows that electroacupuncture seems to be better than acupuncture, but there is a lack of clinical research to directly compare the two.
 
  This is a prospective randomized controlled trial to compare the efficacy of electroacupuncture and acupuncture in the treatment of CSR and to explore the safety and potential mechanism of electroacupuncture in the treatment of CSR. Approved by the Clinical Research Ethics Committee of our hospital, the patients are randomly divided into an experimental group (electroacupuncture group) or control group (acupuncture group). The patients are followed up for 30 days after 4 weeks of treatment. Observation indexes included VAS score, Neck Disability Index, Yasuhisa Tanaka 20 Score Scale, adverse reactions and so on. Finally, the data will be analyzed by SPSS 18.0 software.
 
  This study will directly compare the advantages and disadvantages of electroacupuncture and acupuncture in the treatment of CSR. The results of this study will help to guide patients with CSR to choose appropriate treatment.
 
  OSF Registration number DOI 10.17605/OSF.IO/9MKPN.
 OSF Registration number DOI 10.17605/OSF.IO/9MKPN.
  Background Atrial fibrillation (AF) is a type of arrhythmia that represents a severe health hazard. The current therapies for AF have achieved success in some conditions. However, because the mechanisms underlying the occurrence and development of this disease remain unclear, the current treatment for AF often does not achieve the desired outcomes. Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs), which exert robust effects on specific cardiovascular diseases, are widely used in the clinic. Several studies are focusing on the effect of ACEIs/ARBs on the prevention and cure of AF. Some systematic reviews have obtained different and even opposite results. An overview is required to obtain a conclusion and provide strong evidence to guide clinical work.Methods We searched 5 databases, including MEDLINE, EMBASE, Cochrane Library, Web of Science, and CNKI (Chinese), and selected relevant reviews that passed the assessment we performed. Then, we synthesized the data for eaF therapy for patients with heart failure due to their additional benefits. Moreover, for patients who have suffered AF, ACEIs/ARBs may be a routine drug for secondary prevention.
  Rheumatoid arthritis is a kind of chronic crippling disease, the condition is complex, the course of the disease is repeated, seriously affecting the quality of life of patients. Adverse reactions and drug resistance associated with conventional treatment can no longer meet the clinical need. Therefore, complementary and alternative therapies need to be explored. The evidence shows that silver needle therapy has advantages in the treatment of rheumatoid arthritis, but there is a lack of standard clinical studies to verify this conclusion.
 
  This is a prospective randomized controlled trial to study the efficacy and safety of silver needles in the treatment of rheumatoid arthritis. Approved by the Clinical Research Ethics Committee of our hospital. The patients are randomly divided into a treatment group (silver needle treatment group) or control group (routine western medicine treatment group). The patients are followed up for 2 months after 4 weeks of treatment. Observation indicators include TCM symptom score, HAQDI score, DAS-28 score, laboratory indicators, adverse reactions and so on.