Pencegahan Kanker Sofia Peterson AMERICAN CANCER SOCIETY, ANNALS OF, CANCER PREVENTION, CLINICAL TRIALS, DISEASE PREVENTION, GINA KOLATA, HPV VACCINE, INTERNAL MEDICINE, KAREN E. KNUDSEN, KN, KNUDSEN, MEDICINE, MICHAEL HALPERN, NORTH AMERICA, PHARMACEUTICALS, THE TIMES, UNITED STATES Penelitian Menyebutkan Biaya Skrining Kanker Mencapai $43 Miliar Setiap Tahun