1. Department of Public Health, Epidemiology and Health Economics; University of Liège; Liège Belgium
2. Support Unit in Epidemiology and Biostatistics; University of Liège; Liège Belgium
3. Department of Motricity Sciences; University of Liège; Liège Belgium
4. Bone, Cartilage and Muscle Metabolism Unit; CHU Liège; Liège Belgium