Despite launching almost six years ago, the Valve Index is still able to keep up with many of today’s PC VR headsets. Of course, there have been plenty of headsets since then, including cheaper ...

bhvi.org; Dr Xun Xu; drxuxun{at}sjtu.edu.cn Purpose To develop age-specific and gender-specific reference percentile charts for axial length (AL) and AL/corneal radius of curvature (AL/CR) and, to use ...

The primary symptoms of axial spondyloarthritis (axSpA), a chronic inflammatory disease, include back pain, fatigue, joint pain, heel pain, sleep problems, and abdominal pain. Symptoms vary from ...

As the heart muscle contracts, it propels the blood out into the vascular system. The heart’s chambers and valves are arranged to direct the flow of the blood as the heart beats. The heart has two ...