1. For the 5-day inhalation test for bio- In Germany MMVF currently are
2. durability a biphasic kinetic may be the regulated partly on the basis of the chemical
3. best approach leading to two half-times for composition of fibers. This approach is
4. the fast and the slow phase. based primarily on correlation between car-Although from a scientific point of cinogenicity data after ip injection and
5. view there are ongoing questions about chemical composition (18).