GH1 and Prader-Willi syndrome: Nowadays, indications for treatment with recombinant human growth hormone (rhGH) include not only growth hormone deficiency (GHD) but also a number of other conditions, such as Turner syndrome (TS), Prader-Willi syndrome (PWS), small for gestational age (SGA), chronic renal failure (CRF) and idiopathic short stature (ISS) [1–5].