Alle patienterne i den anden undersøgelse var blevet behandlet med EPREX/ ERYPO i mindst tre måneder, inden de skiftede over til Silapo eller fortsatte behandlingen med EPREX/ ERYPO i 12 uger.
All of the patients in the second study had been receiving treatment with EPREX/ ERYPO for at least three months before they were either switched to Silapo or remained on EPREX/ ERYPO for 12 weeks.