The first and second levels of sub-topics included predictors of falls and, or fractures in older adults, 3a: vitamin D deficiency; 3aa: hyperparathyroidism; 3ab: sun exposure in RACFs; 3 ac: vitamin D intake in RACFs; 3b: hospitalisation; 3c: vitamin D supplement intake; 3d: serum parathyroid hormone; 3e: aging in men; 3f: low vitamin D status; and 3 g: bone mineral density (BMD). The gene discussed is PTH; the disease is hyperparathyroidism.