A. L. Carrel, S. E. Myers, B. Y. Whitman, et al. Sustained bene- fits of growth hormone on body compostion, fat utlization, phy- sical strength and agility, and growth in Prader-Willi syndrome are dose-dependent. Journal of Pediatric Endocrinology & Me- tabolism, 2001, 14(8): 1097-1105.