@article{article16b4621c,
title   = {Willingness to pay as patient preference to bariatric surgery},
author = {Khawali, Cristina and Ferraz, Marcos B and Zanella, Maria T and Ferreira-Vivolo, Sandra Roberta Gouvea},
year = {2011},
doi = {10.1111/j.1369-7625.2011.00738.x},
journal   = {Health Expectations}
}