Original: Stefan Elmgren assumed the lead guitar and Patrik Räfling assumed the drums (they joined the band in the end of 1997 after the release of Glory to the Brave album) and Fredrik decided to remain in the band until a suitable replacement for him was found.
Simplified: To fill the empty musical spots, Stefan Elmgren assumed the lead guitar and Patrik Räfling assumed the drums and Fredrik decided to remain in the band until a suitable replacement for him was found.