Serum 25(OH) vitamin d level is associated with treatment outcome of whole-body vibration (WBV) for osteopenia in girls with adolescent idiopathic scoliosis (AIS). Issue 1 (December 2015) - Lam, Tsz; Ng, Bobby; Yu, Fiona; Tsang, Echo; Lee, Wayne; Cheung, Franco; Chen, Huan; Cheng, Jack