assessment and prevention of pressure ulcers: a clinical practice guideline from the American College of Physicians. Annals of Internal Medicine. March 2015,
LJ; et al. Recommendations for blood pressure measurement in humans and experimental animals: Part 1: blood pressure measurement in humans: a statement
the lifting gas is stored in internal “gasbags”. The Graf Zeppelin II and the Hindenburg were both rigid airships. Pressure airships are sometimes made