Logan, J W
Dammann, O
Allred, E N
Dammann, C
Beam, K
Joseph, R M
O'Shea, T M
Leviton, A
Kuban, K C K
,
Article History
Received: 15 June 2016
Revised: 20 October 2016
Accepted: 1 November 2016
First Online: 12 January 2017
Competing interests
: The authors declare no conflict of interest.