Grey Healthcare Group Acquires Minority Interest in OptimizeRx in the US NEW YORK, Sept. 30, 2015 (GLOBE NEWSWIRE) -- WPP's wholly-owned operating company Grey Healthcare Group ("GHG"), a leading healthcare communications services company, has acquired a minority interest...

ghg (Grey Healthcare Group) acquires minority interest in PARx Solutions NEW YORK, May 19, 2015 (GLOBE NEWSWIRE) -- ghg (Grey Healthcare Group), a leading healthcare communication services agency, today announced it has acquired a minority interest in PARx Solutions, Inc....