Double-blind, controlled calcium supplementation and bone mineral accretion in children accustomed to a low-calcium diet. - Lee,W.T.; Leung,S.S.; Wang,S.H.; Xu,Y.C.; Zeng,W.P.; Lau,J.; Oppenheimer,S.J.; Cheng,J.C. (Am J Clin Nutr, 1994)