Lost credit card cheap clomiphene citrate hindi Bristol-Myers Squibb Co.’s Yervoy is already on the market for melanoma, and that company, along with Merck & Co. and Roche Holding AG, have candidates advancing in clinical trials. The checkpoint inhibitors target molecular mechanisms that enable tumors to evade detection by the immune system. The effect when they work, researchers say, is to release the brakes on the immune system to allow it to attack the tumor.
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