@article{Karaca-Mandi2012,
author = {Karaca-Mandi, P. and Norton, E.C. and Dowd, B.},
title= {Interaction terms in nonlinear models},
year = {2012},
doi = {10.1111/j.1475-6773.2011.01314.x},
journal = {Health Services Research},
volume = {47},
number = {1},
pages = {255--273},
}