Correlation between acupuncture dose and pregnancy outcomes in women with polycystic ovary syndrome undergoing in vitro fertilization-embryo transfer: a systematic review.

Background: Increasing studies focused on the efficacy of acupuncture on pregnancy outcomes in patients with polycystic ovary syndrome (PCOS) undergoing in vitro fertilization-embryo transfer (IVF-ET). However, debatable conclusions have been drawn from different randomized controlled trials (RCTs), which might be related to different doses of acupuncture.

Objective: To evaluate whether acupuncture has a dose-dependent effect on pregnancy outcomes in patients with PCOS undergoing IVF-ET in systematically reviewing.

Crystal structures and mechanical properties of osmium diboride at high pressure.

We have investigated the crystal structures and mechanical properties of osmium diboride (OsB) based on the density functional theory. The structures of OsB from 0 to 400 GPa were predicted using the particle swarm optimization algorithm structure prediction technique. The orthorhombic Pmmn structure of OsB (oP6-OsB) was found to be the most stable phase under zero pressure and it will transfer to the hexagonal P6/mmc structure (hP6-OsB) around 12.

study of elastic anisotropies and thermal conductivities of rhenium diborides in different crystal structures.

The phase stabilities, elastic anisotropies, and thermal conductivities of ReB diborides under ambient conditions have been investigated by using density functional theory calculations. It was found that 6/ (hP6-ReB), (oP6-ReB), 3̄ (hR3-ReB), 3̄ (hR6-ReB), and 2/ (mC12-ReB) of ReB are both mechanically and dynamically stable, and the order of phase stability is hP6 > oP6 > hR3 > hR6 > mC12. Moreover, the calculated Vickers hardness showed that hP6-ReB, oP6-ReB, hR3-ReB, and mC12-ReB were potential hard materials, while hR6-ReB could not be used as a candidate hard material.

The method quality of cross-over studies involved in Cochrane Systematic Reviews.

Background: It is possible that cross-over studies included in current systematic reviews are being inadequately assessed, because the current risk of bias tools do not consider possible biases specific to cross-over design. We performed this study to evaluate whether this was being done in cross-over studies included in Cochrane Systematic Reviews (CSRs).

Methods: We searched the Cochrane Library (up to 2013 issue 5) for CSRs that included at least one cross-over trial.

Association between miR-146a rs2910164 polymorphism and autoimmune diseases susceptibility: a meta-analysis.

Published data on the rs2910164 in microRNA-146a (miR-146a) are shown to be associated with increased or decreased autoimmune diseases risk. To derive a more precise estimation of the relationship, we performed a meta-analysis to systematically summarize the possible. A meta-analysis including 11 studies with 3042 controls and 2197 cases was performed for genotypes CC (recessive effect), CC+CG (dominant effect) and C allele in fixed or random-effects models based on between-study heterogeneity.