GlaxoSmithKline has received approval from the FDA for Mekinist (trametinib) for use in combination with Tafinlar (dabrafenib) for the treatment of patients with unresectable melanoma (melanoma that cannot be removed by surgery) or metastatic melanoma (melanoma which has spread to other parts of the body) with BRAF V600E or V600K mutations. These mutations must be detected by an FDA-approved test. The approval of the combination is based on the demonstration of response rate and median duration...