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Value of doctor's second opinion

A second opinion from a doctor could give you a second chance at survival. A new study found that only 12 percent of patients seeking a second opinion at the Mayo Clinic got confirmation of their original diagnosis, and 21 percent received a "distinctly different" one. The gap could cause unnecessary procedures, more invasive treatments or even death. Dr. David Agus joins "CBS This Morning" to discuss the findings.
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