If you are found to be eligible to take part in this study, you will be randomly assigned (as in the toss of a coin) to one of two treatment groups. Participants in one group will receive standard care with calcium and Vitamin D alone. Participants in the other group will receive standard care with calcium and Vitamin D plus zoledronic acid. There is an equal chance of being assigned to either group. Both you and your study doctor will know if you are being treated with zoledronic acid.