[1] Wake Forest Univ, Baptist Med Ctr, Dept Dermatol, Winston Salem, NC 27157 USA
[2] Wake Forest Univ, Baptist Med Ctr, Dept Neurobiol, Winston Salem, NC 27157 USA
[3] Wake Forest Univ, Baptist Med Ctr, Dept Anat, Winston Salem, NC 27157 USA
[4] Univ Massachusetts, Sch Med, Worcester, MA USA