Richardson, M B
Williams, M S
Fontaine, K R
Allison, D B
Article History
Received: 23 September 2016
Revised: 8 February 2017
Accepted: 4 March 2017
First Online: 15 March 2017
Competing interests
: DBA has received financial support from numerous nonprofit and from profit organizations including government, litigators, food and beverage, pharmaceutical and publishing companies. The remaining authors declare no conflict of interest.