Levy, M A
McKinnon, T
Barker, T
Dern, A
Helland, T
Robertson, J
Cuomo, J
Wood, T
Dixon, B M
Article History
Received: 22 July 2013
Revised: 24 April 2014
Accepted: 24 May 2014
First Online: 16 July 2014
Competing interests
: With the exception of TB, each author is currently (ML, TM, JR, JC, TW & BD) or was formerly (AD, TH) employed by USANA Health Sciences which funded this work. This manuscript was prepared on company time. The remaining authors declare no conflict of interest.