Non-parametric methods for estimating confidence intervals around the incremental cost-effectiveness ratio.

Petrinco M, Gregori D, Lazzarato F, Brunello F, Veltri A, Berchialla P, Pagano E.

Epidemiol Prev 2008; 32: 307-13.

http://www.ncbi.nlm.nih.gov/pubmed/19353965