1. Dermatology Associates, University of Connecticut Health Center, Farmington, CT 06030, U.S.A.
2. SkinCare Physicians®, Chestnut Hill, MA, U.S.A.
3. Department of Dermatology, University of Utah, Salt Lake City, UT, U.S.A.
4. Abbott Laboratories, Abbott Park, IL, U.S.A.
5. Analysis Group, Boston, MA, U.S.A.