FDA approves human embryonic stem cell study


<p><br /> (CNN) — Federal regulators have cleared the way for the first human trials of human embryonic stem-cell research, authorizing researchers to test whether the cells are safe to use in spinal injury patients, the company behind the trials announced Friday.</p> <p><br /> Embryonic stem cells are blank cells found in embryos, which have the ability to turn into any cell in the body…</p>