Koyama, S
Tanabe, S
Saitoh, E
Hirano, S
Shimizu, Y
Katoh, M
Uno, A
Takemitsu, T
Article History
Received: 9 February 2015
Revised: 3 May 2015
Accepted: 22 June 2015
First Online: 11 August 2015
Competing interests
: TT is a salaried employee of the ASKA Corporation, which produces WPAL. AU is a salaried employee of the Tomei Brace Company, which distributes WPAL. The remaining authors declare no conflict of interest.