Time-varying prognostic value of primary tumor sidedness in metastatic colorectal cancer: A population-based study and meta-analysis.

"CONFLICT OF INTEREST Dave E. W. van der Kruijssen reported a grant from Dutch Cancer Society (KWF) and an unrestricted grant from Hoffmann‐La Roche Ltd outside the submitted work; Geraldine R. Vink reports grants from Servier, Merck, Pierre Fabre, Sirtex, BMS, Bayer outside the submitted work and non‐financial support from PGD; Johannes H. W. de Wilt reported grants from Dutch Cancer Society and an unrestricted grant from Hoffmann‐La Roche Ltd, grants from Dutch Cancer Society, Bergh in het zadel foundation, ZONMW and Medtronic outside the submitted work; Miriam Koopman reported grants from KWF (Dutch Cancer Society) and an unrestricted grant from Hoffmann‐La Roche Ltd., receiving institutional scientific grants from Bayer, Bristol Myers Squibb, Hoffmann‐La Roche Ltd., Merck, Servier and Pierre Fabre outside the submitted work, and paid advisory roles (finances to institution) for Nordic Farma, Merck Serono, Pierre Fabre, Servier, and MSD outside the submitted work. The other authors do not declare a conflict of interest."