Tsair-Wei Chien, Weng-Chung Wang, Sho-Be Lin, Ching-Yih Lin, How-Ran Guo and Shih-Bin Su*
* Corresponding author: Shih-Bin Su shihbin.su@msa.hinet.net
BMC Medical Research Methodology 2009, 9:38 doi:10.1186/1471-2288-9-38