Pitino, Marco
Armstrong, Cheryl M
Duan, Yongping
Article History
Received: 12 June 2015
Revised: 6 August 2015
Accepted: 7 August 2015
First Online: 9 September 2015
Competing interests
: All authors certify that they have no affiliations with any organization or entity with a competing financial interest that would influence the outcome of the subject matter or materials discussed in this manuscript.