Pitzer, Virginia E.
Bilcke, Joke
Heylen, Elisabeth
Crawford, Forrest W.
Callens, Michael
De Smet, Frank
Van Ranst, Marc
Zeller, Mark
Matthijnssens, Jelle
Article History
Received: 19 June 2015
Accepted: 20 November 2015
First Online: 21 December 2015
Competing interests
: M.C. and F.D.S. are employees of National Alliance of Christian Sickness Funds in Belgium.