Non-interventional, Long-term Safety Data Collection of Zarzio® / Filgrastim HEXAL® in Stem Cell Donors

Inclusion Criteria: Volunteer adult healthy unrelated donors who have received at least one dose of Sandoz' filgrastim for PBPC mobilization Exclusion Criteria: * Donors of age \<18 years * Related to recipient * Chronic significant organ diseases * Systemic autoimmune diseases * Chronic infectious diseases * History of malignant disease * Pregnant and breastfeeding women * Hypersensitivity to E. coli derived proteins * Hypersensitivity to the active substance or to any of the excipients of Sandoz' filgrastim * Absolute and relative contraindications as specified in the SmPC of Sandoz' filgrastim * Participation in previous stem cell mobilization procedures * Previous or concurrent use of other mobilizing agents, e.g. plerixafor * Informed consent was not signed prior to beginning of documentation.