<qa>  How many study visits will be conducted at McLean Hospital?We plan to study 15 male and female subjects between the ages of 18 and 65 years who have had gastrointestinal symptoms at least 2 daysweek for greater than six months and who have been diagnosed with IBS by a physician. During the 12-week study, subjects will receive open-label duloxetine titrated up to 60mgday. Subjects will be asked to complete a total of ten study visits during the 12-week study period. All study visits will be conducted at McLean Hospital. 