[1] Boston Univ, Sch Med, Dept Dermatol, Boston, MA 02118 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Boston Univ, Sch Publ Hlth, Canc Prevent & Control Ctr, Boston, MA USA
[4] Boston Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA USA
[5] Boston Univ, Sch Publ Hlth, Dept Biostat, Boston, MA USA
[6] Massachusetts Dept Publ Hlth, Boston, MA USA
[7] NYU, Sch Med, Ronald O Perelman Dept Dermatol, New York, NY USA
[8] Stanford Univ, Sch Med, Stanford, CA 94305 USA
[9] Virginia Commonwealth Univ, Sch Med, Richmond, VA USA
[10] Univ Texas, SW Med Sch, Dallas, TX 75230 USA
[11] Mayo Clin & Mayo Fdn, Mayo Med Sch, Rochester, MN 55905 USA
[12] Univ Michigan, Sch Med, Ann Arbor, MI USA