Black, C N
Penninx, B W J H
Bot, M
Odegaard, A O
Gross, M D
Matthews, K A
Jacobs, D R Jr
Article History
Received: 14 September 2015
Revised: 2 December 2015
Accepted: 25 December 2015
First Online: 23 February 2016
Competing interests
: The authors declare no conflict of interest.