We are in the process of establishing an apheresis program in a pediatric setting, and would like to hear any comments you have on the following:' For photopheresis: 1. Do you prefer to prime the apheresis machine with blood, or to have a minimum hematocrit requirement for the patient? 2. If you prefer a blood prime, do you use red cells or a reconstituted unit containing red cells and plasma? 3. Do you have a minimum platelet count? 4. Do you use heparin or citrate, or a combination of the two? For photopheresis and TPE: 1. If you use citrate, do you use CaCl? 2. If so, at what dose? Thanks, Jerry Sapp Childrens of Alabama