<qa>  What is the minimum wash-out period between the two study periods?For each of the 2 study donation periods, this study will have the following procedures: single or double dose platelet apheresis collection, pathogen inactivation with INTERCEPT Blood System treatment, storage for 6 or 7 days depending on the period and randomization scheme at 20C to 24C with agitation, collection of fresh autologous platelets, radiolabeling, infusion of fresh and stored INTERCEPT Blood System-treated radiolabeled autologous platelets, and collection of blood samples for assessment of platelet recovery and survival lifespan. There will be a minimum wash-out period of two weeks between the two study periods. 