This study was limited in several aspects. First, the timeframe to collect data
was too short. Three to four weeks for the study was not sufficient. Second, a total of 50
questionnaires were administered, however usable questionnaires were 48, so the result
may not reflect the real situation for the whole population. With this sample size, the
estimated sample error is 14.4%, so an increase in sample size might yield different
results. And, of course these results might be affected by this very large sample error.