DEAR DR. BLONZ: I was hoping you might spread the word about the National Organization for Rare Diseases (rarediseases.org). When a family member was diagnosed with a rare disease, NORD was the only place that had usable information. After a lot of anxiety among family members in the waiting room and head-scratching by the doctors, they thought this deficiency might be the issue. It can have a genetic element, so I encouraged my family members to be tested. Stay well, stay informed, and be sure that health professionals have all the information needed to care for you and your family members.