Statement: certain cohorts in the primary clinical trial are mandated to undergo a surgical procedure as part of the study's protocol.
Primary_evidence: INTERVENTION 1:    No Exercise   Multivitamin Arm + Calcitriol Arm:Calcitriol pill taken once per week INTERVENTION 2:    Exercise   Exercise Arm: Exercise consisting of progressive walking and resistance band training   Calcitriol+ Exercise Arm: Calcitriol pill taken once per week + Exercise