Authors’ response (December 8, 2017) to the letter to the Editor concerning the paper “Occupational exposure to radon for underground tourist routes in Poland: Doses to lung and the risk of developing lung cancer” Journal title: International Journal of Occupational Medicine and Environmental Health Authors: Katarzyna Walczak, Jerzy Olszewski, Piotr Politański, Marek Zmyślony Subject(s):