Long-term effects of growth hormone therapy on bone mineral density, body composition, and serum lipid levels in growth hormone deficient children: a 6-year follow-up study - van der Sluis, I M; Boot, A M; Hop, W C; De Rijke, Y B; Krenning, E P; de Muinck Keizer-Schrama, S M (Horm Res, 2002)