[1] New Mexico Clin Res & Osteoporosis Ctr, Albuquerque, NM 87106 USA
[2] Childrens Hosp, Boston, MA 02115 USA
[3] Colorado Ctr Bone Res, Lakewood, CO USA
[4] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[5] Univ Sheffield, Sheffield, S Yorkshire, England
[6] IRCCS, Ist Auxol Italiano, Milan, Italy
[7] Cincinnati Childrens Hosp, Med Ctr, Cincinnati, OH USA
[8] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[9] Childrens Hosp, Omaha, NE USA
[10] Univ Nebraska, Med Ctr, Omaha, NE USA
[11] Shriners Hosp Children, Montreal, PQ, Canada
[12] Univ Wisconsin, Madison, WI USA
[13] Columbia Univ, Coll Phys & Surg, New York, NY USA
[14] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada
[15] Univ Hosp Geneva, Geneva, Switzerland
[16] Osteoporosis Med Ctr, Beverly Hills, CA USA