Background Access is central to the performance of health care systems around the world.
However, access to health care remains a complex notion as exemplified in the variety of …

The concept of hematopoietic stem cell (HSC) niche was formulated in 1978, but HSC niches
remained unidentified for the following two decades largely owing to technical limitations. …

Background Lead is a known toxicant that occurs naturally in the environment. Bisphenol A (BPA)
is an industrial chemical used primarily in polycarbonate plastic and epoxy resins. It …

Single-electron wavefunctions, or orbitals, are the mathematical constructs used to describe
the multi-electron wavefunction of molecules. Because the highest-lying orbitals are …

A fundamental question about the relationship between cognition and emotion concerns the
neural substrate underlying emotional self-regulation. To address this issue, brain activation …

BACKGROUND: The ability to voluntarily self-regulate negative emotion is essential to a
healthy psyche. Indeed, a chronic incapacity to suppress negative emotion might be a key factor …

Hematopoietic progenitor cells (HPCs) normally reside in the bone marrow (BM) but can be
mobilized into the peripheral blood (PB) after treatment with GCSF or chemotherapy. In …

In the bone marrow, hematopoietic stem cells (HSCs) reside in specific niches near
osteoblast-lineage cells at the endosteum. To investigate the regulation of these endosteal niches, …

Questions pertaining to the neurobiological effects of psychotherapy are now considered
among the most topical in psychiatry. With respect to this issue, positron emission tomography (…

Background Although epidural corticosteroid injections are commonly used for sciatica,
their efficacy has not been established. Methods In a randomized, double-blind trial, we …