We thank A. Gaudry and F. Carrot for their ICP/MS expertise, E. Mitchell and M. Simonoff for their encouragement, and many colleagues and organizations in Bangladesh for their support.

This study was supported by The Hospital for Sick Children in Toronto, Canada; the Université de Bordeaux 1, and Centre National de la Recherche Scientifique, Laboratoire de Chimie Nucléaire Analytique et Bioenvironnementale in Gradignan, France; and Better Life Laboratories, Inc. of East Calais, Vermont, USA.

• E-mail the President of Better Life Laboratories, Seth H. Frisbie, Ph.D. (shf3@cornell.edu).
• Write us at Better Life Laboratories, 293 George Rd., East Calais, VT 05650, USA.