sci
hub

to open science
Stefan Michiels; Aurélie Le Maître; Marc Buyse; Tomasz Burzykowski; Emilie Maillard; Jan Bogaerts; Jan B Vermorken; Wilfried Budach; Thomas F Pajak; Kian K Ang; Jean Bourhis; Jean-Pierre Pignon. (2009). Surrogate endpoints for overall survival in locally advanced head and neck cancer: meta-analyses of individual patient data. , 10(4), 0–350. doi:10.1016/s1470-2045(09)70023-3 
10.1016/s1470-2045(09)70023-3