Medical Discovery News, May 31, 2008 Saturday's edition of Medical Discovery News, by UTMB professors Norbert Herzog and David Niesel, focused on sunscreens and their effect on UV-B and UV-A rays. They note that it has taken 20 years, but starting in 2009 manufacturers will start labeling their products based on the efficacy of their products at protecting against harmful exposure to the sun. Medical Discovery News airs at 10 a.m. on KUHF-FM in Houston. The program is aired by 48 radio stations.