I am a vascular surgeon who has worked nonstop for 40 yrs of practice. The EMR's, while creating a a better-looking record, take about 30% more time from the health care professionals to enter the data into the system. This is time spent away from the patient. In the case of nurses, doctors and therapists this has led to less bedside care and more FaceTime with the computer. In our office, we have hired scribes to enter the data as I see the patient so I can concentrate on my customer and not the computer. The cost of the extra personnel is paid out of our overhead, but the use of EMR is mandated by the government. Sorry to digress about one of my pet peeves. Your article is excellent and with good examples of how blockchain will improve access of records and protect privacy all at once. It will definitely help coalesce the scattered and inefficient present systems into a patient centered one. Just another example of the blockchain revolution. Isn't it exciting? You have my up vote.