how do i measure the incidence of omentectomy what is the difference between incidences for routine omentectomy? how do i calculate incidence of omentectomy how to calculate an incidence of omentectomy how to find the difference between incidences of omentectomy what is the difference between incidences how should incidence and incidence be calculated what is the difference between incidence of symtoms and occult metastases how to calculate the difference between incidence and incidence what is the difference between incidence for omentectomy how do you calculate incidence of omentectomy how to compare the incidence of metastasis in ovarian cancer difference between incidence and incidence how do you calculate incidences of cancer how do you determine the difference of incidences? difference between incidence and incidence how do you calculate the difference between incidents difference between incidence of omentectomy how to calculate the difference between incidence of the same cancer does an omentectomy have to be done