Erdös, Judit
Ettinger, Sabine
Mayer-Ferbas, Julia
de Villiers, Cecilia
Wild, Claudia
Funding for this research was provided by:
Third Health Programme (724130)
Article History
Received: 6 November 2018
Accepted: 15 January 2019
First Online: 6 February 2019
Conflict of interest
: J. Erdös, S. Ettinger, J. Mayer-Ferbas, C. de Villiers, and C. Wild declare that they have no competing interests.