Never been to any of them but You can try the two clinics that perform circulation:
Ar-Raudhah Medicare Clinic
Blk 372, Bukit Batok St 31
#01-386, Singapore 650372
Dr Amir Adha Bin Abdullah
Tel: +65 6567 7458
Eden Family Clinic
Blk 492, Jurong West St 41
#01-54, Singapore 640492
Dr Elias Tham
Tel: +65 6566 0257