1. From University of Pittsburgh, Pittsburgh, Pennsylvania; Michigan Bone and Mineral Clinic, Detroit, Michigan; Radiant Research Center of South Florida and The Regional Osteoporosis Center, Stuart, Florida; University of Calgary Health Sciences Center, Calgary, Alberta, Canada; Helen Hayes Hospital, Regional Bone Center, West Haverstraw, New York; Instituto de Investigaciones Metabólicas, Buenos Aires, Argentina; and NPS Pharmaceuticals, Inc., Parsippany, New Jersey.