Hi - I highly recommend Dr John Ngan for the urologist. He did a procedure on my two year old earlier this year and was excellent. He is in the Central Building. Tel: 31040840. If you don't get any replies on the cardiologist I also recommend a paediatrician, Dr Steve Wong who will refer you. He was present at the birth of both my sons and we have seen him ever since. I have found him at all times caring, attentive and an all round excellent doctor. Tel: 25267633