Schwere Adipositas, obstruktive Erkrankung der oberen Atemwege oder Schlafapnoe in der Anamnese, ungeklärter Atemwegsinfekt. ###>There have been reports of sleep apnoea and sudden death after initiating growth hormone therapy in patients with Prader-Willi syndrome, who had one or more of the following risk factors: severe obesity, history of upper airway obstruction or sleep apnoea, or unidentified respiratory infection.