MuzhichukА., Afanasyeva, N. and Muzhichuk, V. 1. VALUE OF THE PROGNOSTIC MARKERS OF THE TUMOR PROGRESSION P53, P21WAF1/CIP1, P63 AND KI-67 IN THYROID TUMORS. The Journal of V. N. Karazin Kharkiv National University, series "Medicine". 18 (1), 4-9.