An Open-Label, Four-Part, Phase I/II Study to Investigate the Safety, Pharmacokinetics, Pharmacodynamics, and Clinical Activity of the MEK Inhibitor GSK1120212, BRAF Inhibitor GSK2118436 and the anti-EGFR Antibody Panitumumab in Combination in Subjects with BRAF-mutation V600E Positive Colorectal Cancer and in Subjects with CRC With Secondary Resistance to Prior Anti-EGFR Therapy, Trial ID 116833 | GSK