Because of your Parvo, I'm going to mention three doctors. I go to two of them, and they are great. Your doctors seem to have a good handle on this, but my experience is that PRCA is so complicated, that it is a good idea to get a second or third opinion. Even the autoimmune kind is slowly being believed to be part of another illness.
Locally in Dallas, I go to Dr. Cynthia Rutherford at UT Southwestern. She is very experienced in these anemias. I am her only current PRCA patient, but she has had others in the past. I know from conversations I have had with her that she has a special interest in the parvo aspect.
I also go twice a year to Dr. Jaroslaw P. Maciejewski at the Cleveland Clinic. He is mostly a researcher, and only schedules patients on Wednesdays. He has a special interest in PRCA and has had 26 patients the last time I asked him. Here is some detailed information on him. He is also a really nice guy, and will take a personal interest in you. He recently received a $1.9 million grant to study all of the bone marrow diseases to see if they are caused by specific viruses. There are thousands of possible viruses.
http://my.clevelandclinic.org/staff_...?DoctorID=4362
Neal Young, M.D.
National Institutes of Health
is the one I mentioned. Here is some some recent info on him.
http://servicetoamericamedals.org/SA...12_young.shtml
He is difficult to see, but it may be possible to see others at NIH.
I can expand on all of what I have given you if you want. I will also give you my name either as a PM message on this site or by email if you need some sort of referral reference.