Sarah Wherry, Ph.D., University of Colorado Anschutz Medical Campus, will present on changes in ionized calcium, parathyroid hormone, and c-telopeptide of type I collagen during and after an hour of brisk treadmill walking in older women who are either currently take a bisphosphonate medication or who have never used a bisphosphonate. Noor Alhuda Sawalha, M.D., Hebron University & Al-Ahli hospital, will present on Insights into rare forms of Osteogenesis Imperfecta: BMP1-related OI Type XIII and the first report of rheumatoid arthritis in OI Type XI.