Stiefel, a GSK company, enters agreement with Welichem Biotech, Inc. to acquire a novel topical agent for psoriasis and atopic dermatitis PR Newswire RESEARCH TRIANGLE PARK, North Carolina, May 30, 2012 RESEARCH TRIANGLE PARK, North Carolina, May 30, 2012 /PRNewswire/ -- Stiefel, a GSK (NYSE:GSK) company, and Welichem Biotech, Inc.