Long-term changes in bone metabolism, bone mineral density, quantitative ultrasound parameters, and fracture incidence after spinal cord injury: a cross-sectional observational study in 100 paraplegic men. - Zehnder Y; Lüthi M; Michel D; Knecht H; Perrelet R; Neto I; Kraenzlin M; Zäch G; Lippuner K (Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2004)