Kaiser Permanente in Northern California was chosen to assist with the investigation, which involved skin biopsies from affected people and characterization of foreign material such as fibers or threads obtained from people to determine their potential source.
Kaiser Permanente in Northern California was chosen to assist with the investigation. The investigation involved skin biopsies from affected people and characterization of foreign material such as fibers or threads. These fibers or threads were obtained from people. This was to determine their potential source.