Dr. Chiu Cheung Shing @ Jordon (Tel 2770 3300) , he is very good, he is always willing to spend a long time to explain things to parents and he can diagnose BB's illness very quickly and accurately but many parents see him so his clinic is very crowded and waiting time is super long
Another good doctor--Dr. Ng Man To @ Tseng Kwan O (near Po Lam MTR station, Tel 2305 0080), also very good but no need to wait that long