What are the greatest medical discovery in the 20th century?

How long are medical records kept in Rhode Island? What is opd nurse? What is the best thing to do if you get sick from too much sun? What kind of water must be used for medical preparations and why? What do you call someone who analyses x-ray for diagnosis? What is in pliatrol? Is CPR the same for an electrocution victim? Why water is important to the bones? What to do if you SWALLOW a lead bb pellet? How can you meditate? What doctors can prescribe triplicate prescriptions? Is there medical care in shanty town? Why do you need to insert a nasogastric tube for an intubated patient? Which of the following is a surface barrier to infection? Does a self employed hairdresser and beautician need liability insurance? Why do you think the Western medical profession is sometimes concerned about the use of herbal remedies? Can a CNA place or remove a foley catheter? How does a girl grow? What do homoeopaths have to offer the profession? What does the medical code 80050 stand for?