977 Development of a non-small cell lung cancer PDX model in a myeloid-boosted humanized host highlights a M2 polarization phenotype within the myeloid compartment by Stefano Cairo, Mara Gilardi, Brandon Walling, Marianna Zipeto, Alex Moreau, Kiave Yune Ho Wang Yin, Nektaria Papadopoulou, Sebastian Brabetz, David DeOrnellis