calculate_mme.data.frame
                        Calculate morphine milligram equivalents (MME)
                        with a 'data.frame' or tibble
calculate_mme.list      Calculate morphine milligram equivalents (MME)
                        for a single study participant
get_med_list            Retrieve full opioid medication list
opioid_trial            Opioid Trial Data
search_meds             Search opioid medication list
