Proficiency Testing of Standardized Samples Shows Very High Interlaboratory Agreement for Clinical Next-Generation Sequencing--Based Oncology Assays. - Merker, Jason D.; Devereaux, Kelly; Iafrate, A. John; Kamel-Reid, Suzanne; Kim, Annette S.; Moncur, Joel T.; Montgomery, Stephen B.; Nagarajan, Rakesh; Portier, Bryce P.; Routbort, Mark J.; Smail, Craig; Surrey, Lea F.; et al. (Archives of Pathology & Laboratory Medicine, 2019)