Alas, I get a positive response from Dr. chang's e-mail. actually...it is his facility manager relaying my message to dr. chang. He is happy to see me. He consults on a Wednesday and friday and does surgery on tuesday and wednesday. Surgery can be booked on the following day after consultation or the following week. He followup after 1 day, 1 week then 2-4 week after surgery. So, i guess i have to stay in sydney for at least 2 weeks if i have a surgery by him.