You should probably get in touch with Nicole, her son is about the same age as your daughter. He was diagnosed with moderate AA, failed one ATG course, and went on to do a transplant at Sick Kids in Toronto.
www.caringbridge.org/visit/evanmacneil
Also, if you are interested in obtaining additional information, I have medical articles pertaining to pediatric AA in pdf form, I can send them to you if you post your e-mail address.
Sandra