laboratory diagnostic - drugs - Ritonavir - Serum, serum 3ml. The serum must be frozen within 4 hour after collection and must be sent in the frozen samples container(!) sample at T0 (before intake). T1H and T3H (after intake). Attach the completed clinical information form supplied upon request, HPLC/UVD-F, ssso, todylaboratories®, bmn, code L16LD1495