Zaini,
I wonder if your doctor would be willing to talk to the doctors in Oakland, and do the appropriate tests with lil Z. In the past, levels between 1000 - 2000 were deemed acceptable for thals, and these thals, although they are growing up and living long lives are having some issues such as infertility, other endocrinology issues etc. I truly believe that keeping a child's hemoglobin as close to normal (10) as possible and keeping the iron levels as close to normal as possible is the key to having them grow up normal and healthy.
I am confident that her organs are most likely free of iron because of the short duration that she has been transfused, and because she was on a very good chelation plan. Especially, the L1/desferal - and now the exjade.
Sharmin