Nurse Missy is attending to the needs of 12 patients in her hospital ward.  Most of her patients require standard care, but one-third of her patients have special dietary requirements, which increases the serving time by 20%.  At dinner time, she brings each patient their meal. It takes 5 minutes to serve each standard care patient.  How long does it take, in minutes, for Missy to serve dinner to all of her patients?
Please reason step by step, and put your final answer within \boxed{}.
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