A young man was feeling ill, so he asked a friend of his to recommend a doctor who specialised in internal medicine.
“I know a great one”, his friend said, “but he is very expensive. He charges $400 for the first visit and $100 for each visit after that”.
Well, the man went to see the doctor.
Trying to save money, he greeted the doctor when he entered the examination room with an animated “I’m back!”
The doctor proceeded with the examination.
“Very good”, he said when he was finished. “Just continue the treatment I prescribed last time”.
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