Franceschini, N
Fry, R C
Balakrishnan, P
Navas-Acien, A
Oliver-Williams, C
Howard, A G
Cole, S A
Haack, K
Lange, E M
Howard, B V
Best, L G
Francesconi, K A
Goessler, W
Umans, J G
Tellez-Plaza, M
Article History
Received: 9 December 2015
Revised: 13 April 2016
Accepted: 9 May 2016
First Online: 15 September 2016
Competing interests
: The authors declare no conflict of interest.