Dahlin, A
Litonjua, A
Irvin, C G
Peters, S P
Lima, J J
Kubo, M
Tamari, M
Tantisira, K G
Article History
Received: 20 August 2014
Revised: 19 November 2014
Accepted: 28 January 2015
First Online: 2 June 2015
Competing interests
: The authors declare no conflict of interest.