We are a federally recognized hemophilia treatment center, treating all rare blood disorders to include hemophilia, VWD, sickle cell disease, and thrombosis across the lifespan (peds + adults). We are looking for standardized approach to evaluate HRQoL in all our patients. Do you recommend a certain tool? Are disease specific tools better for hemophilia? Is the SF-36v2 too generic for our rare disease populations? Is the EQ-5D-3L robust enough to use alone, or must it be used in combo with other measures? Any insight is appreciated.