The Authors reply: Comment on: "Handgrip weakness, low fat‐free mass, and overall survival in non‐small cell lung cancer treated with curative‐intent radiotherapy" by Burtin et al. Issue 2 (28th January 2021) - Burtin, Chris; Bezuidenhout, Jacques; Sanders, Karin J.C.; Dingemans, Anne‐Marie C.; Schols, Annemie M.W.J.; Peeters, Stephanie T.H.; Spruit, Martijn A.; De Ruysscher, Dirk K.M.