A relook into the association of the estrogen receptor alpha gene (PvuII, XbaI) and adolescent idiopathic scoliosis: a study of 540 Chinese cases. - Tang NL; Yeung H; Lee K; Hung VW; Cheung CS; Ng BK; Kwok R; Guo X; Qin L; Cheng JC (Spine (03622436), 2006)