University of Pennsylvania

Online comments can undermine anti-smoking PSAs

Commentary accompanying anti-smoking public service announcements (PSAs) in online forums like YouTube has an impact on the PSA's overall effectiveness. Both negative and positive comments accompanying PSAs degrade the persuasiveness ...

Jan 22, 2014
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Blood stem cell longevity explained

(Medical Xpress)—The blood stem cells that live in bone marrow are at the top of a complex family tree. Such stem cells split and divide down various pathways that ultimately produce red cells, white cells ...

Nov 26, 2013
popularity 5 / 5 (8) | comments 0 | with audio podcast