Pencegahan Kanker Penelitian Marcus Johnson CANCER PREVENTION, CLINICAL TRIALS, FDA, HEALTHCARE, HPV VACCINE, JONATHAN KIMMELMAN, KIM, KIMMELMAN, MCGILL UNIVERSITY, MCGILL UNIVERSITY SCHOOL OF POPULATION AND GLOBAL HEALTH, MEDICINE, NATIONAL CANCER INSTITUTE, OUIMET, RESEARCH Satu Dari Enam Peserta Uji Klinik Fase II Terima Obat Kanker Terbukti Efektif