Davies C, Marshall HS, Brotherton JM, McCaffery K, Kang M, Macartney K, Garland S, Kaldor J, Zimet G, Skinner SR, HPV.edu Study Group Full text Human papillomavirus Immunisation coverage Special risk groups Vaccine trials 2023 Preventive Medicine 2023:107542. doi: 10.1016/j.ypmed.2023.107542 (Epub)