4d pharma plc's (LON:DDDD) Duncan Peyton updates Proactive's Andrew Scott following the news the next stage of its cancer clinical study is underway with four new sites added in the US to accelerate patient recruitment. Up to 30 people per tumour type will participate in Part B of the company’s phase I/II trial to assess its live biotherapeutic, MRx0518, in combination with immune checkpoint inhibitor Keytruda.