human papillomavirus type 11 L1 protein /human papillomavirus type 16 L1 protein /human papillomavirus type 18 L1 protein/human papillomavirus type 6 L1 protein
human papillomavirus type 11 L1 protein /human papillomavirus type 16 L1 protein /human papillomavirus type 18 L1 protein/human papillomavirus type 6 L1 protein
human papillomavirus type 11 L1 protein /human papillomavirus type 16 L1 protein /human papillomavirus type 18 L1 protein/human papillomavirus type 6 L1 protein