FREQUENTLY: Bend/twist, Biohazard waste, Blood and/or Bodily Fluids, Chemicals/Medications, Communicable Diseases and/or Pathogens, Lifting / Carrying: 0-10 lbs, Lifting / Carrying: 11-20 lbs, Lifting / Carrying: 21-40 lbs, Machinery, Patient Equipment, Pushing / Pulling: 0-25 lbs, Pushing / Pulling: 26-40 lbs, Pushing / Pulling: 41-60 lbs, Pushing / Pulling: 61-100 lbs, Sitting, Standing, Walking. Performs research activities as outlined in the protocol; conducts subject data collection and performs study protocol procedures according to recognized skill level and certifications; collaborates, coordinates, and schedules subject study visits with other hospital services and the PI/sub-I; alerts the investigator when the subject's safety is in jeopardy, there is a protocol deviation, or when the subject requests premature study termination.