Tobias, J H Cyclical etidronate prevents spinal bone loss in early post-menopausal women. [electronic resource] - British journal of rheumatology May 1997 - 612-3 p. digital Publication Type: Clinical Trial; Letter; Randomized Controlled Trial ISSN: 0263-7103 Standard No.: 10.1093/oxfordjournals.rheumatology.a031451 doi Subjects--Topical Terms: Bone Density--drug effectsBone Diseases, Metabolic--drug therapyDouble-Blind MethodEtidronic Acid--pharmacologyFemaleHumansLumbar Vertebrae--physiopathologyMiddle AgedOsteoporosis, Postmenopausal--physiopathology