Gardasil™ Intramuscular Solution, Sterile, Human Papillomavirus Type 11 L1 Protein 40 mcg + Human Papillomavirus Type 16 L1 Protein 40 mcg + Human Papillomavirus Type 18 L1 Protein 20 mcg + Human Papillomavirus Type 6 L1 Protein 20 mcg 
 Khoo Teck Puat Hospital 
 Tan Tock Seng Hospital