It is impossbile to give you an idea of your cances on appeal without knowing the details of your case. I would encourage you to appeal and forward a letter detailing what you thought the REferee's errors were. If you have any additional information that was not submitted at the hearing, submit it with your appeal. However, the Bo9ard may not consider additionhal evidence unless there is a good explanation why it was not submitted at the hearing. Good luck.
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Not sure where you are going with this. If you needed intermittent leave, were still on it, and had an "event" related to your meds that fell within the reason for your intermittent leave, sounds like you got a good argument for reversal. The fact you have HIV is s sympathetic issue that gives your appeal emotional impact.