1. Secretary, The Edward H. Angle Society of Orthodontists (EHASO) and The E.H. Angle Education and Research Foundation. Clinical Professor of Developmental Biology, The Harvard School of Dental Medicine, Boston, Mass. Private practice, Newton, Mass
2. Corresponding author: Dr Sheldon Peck, Clinical Professor of Developmental Biology, The Harvard School of Dental Medicine. Boston, MA 02115 (peckslam@att.net or speck@hms.harvard.edu)