1. The Procter & Gamble Company, Sharon Woods Technical Center, 11450 Grooms Rd., Cincinnati, OH 45242
2. Department of Obstetrics and Gynecology, College of Medicine, The Pennsylvania State University, Milton S. Hershey Medical Center, Hershey, PA 17033
3. Bone & Mineral Metabolism Laboratory, Department of Physical Medicine, The Ohio State University, Columbus, OH 43210