Clark Campell, et al. note in a paper in Mental Health Religion and Culture (2009, Vol. 12 (7), pp:627-637) called "Reduction in Burnout May Be a Benefit for Short-Term Medical Mission Volunteers" that burnout scores improved for physicians and nurses after providing medical care on South American short-term medical mission trips. Thirty-six volunteers were scored in the moderate range on 3 scales of burnout before going on the trips.  Their scores showed improvement upon their return and showed continued improvement at a six-month follow up.   "Burnout" was described as involving emotional exhaustion, a sense of depersonalization, and a lack of accomplishments in the workplace.