Valkama, A J
Leinonen, H M
Lipponen, E M
Turkki, V
Malinen, J
Heikura, T
Ylä-Herttuala, S
Lesch, H P
Article History
Received: 2 May 2017
Revised: 25 September 2017
Accepted: 29 September 2017
First Online: 5 October 2017
Competing interests
: AJV is an employee of University of Eastern Finland and FinVector Vision Therapies; HML, VT and JM are employees of FinVector Vision Therapies; EML and HPL are employees of Finvector Vision Therapies and FKD Therapies. No conflict of interest exists for TH and SYH.