TY - JOUR AU - Colon-Lopez, Vivian AU - Vazquez-Otero, Coralia AU - Rivera-Figueroa, Vilnery AU - Arroyo-Morales, Glizette O. AU - Medina-Laabes, Diana T. AU - Soto-Abreu, Roxana AU - Diaz-Miranda, Olga L. AU - Rivera, Angel AU - Cardona, Iris AU - Ortiz, Ana P. AU - VOCESPRAU AU - Hull, Pamela C. PY - 2021 TI - HPV Vaccine School Entry Requirement in Puerto Rico: Historical Context, Challenges, and Opportunities T2 - Preventing Chronic Disease JO - Prev Chronic Dis SP - E77 VL - 18 CY - Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. N2 - SN - 1545-1151 UR - https://doi.org/10.5888/pcd18.210035 DO - 10.5888/pcd18.210035 ER -