Novocure Ltd. and Merck & Co. Inc. will work together to test the use of electric fields at specific frequencies in combination with anti-PD-1 immunotherapy Keytruda (pembrolizumab) to treat non-small-cell lung cancer (NSCLC). The pair plan to start a phase II pilot study during the second half of Novocure’s Tumor Treating Fields in combination with Keytruda as a first-line treatment for intrathoracic advanced or metastatic, PD-L1 positive NSCLC.