Respuesta :
It should look like:
Confused, Drew Dago M. D. looked at several patient's records to analyze similarities.
Confused, Drew Dago M. D. looked at several patient's records to analyze similarities.
The proper punctuation would be the following:
Confused, Drew Dago M D looked at several patients records to analyze similarities.
Confused, Drew Dago M D looked at several patients records to analyze similarities.