[1
]
iMinds-MICT-Ghent University, Department of Communication Sciences, Korte meer 7-9-11,
9000 Ghent, Belgium; IVO Addiction Research Institute Rotterdam, Heemraadssingel 194,
3021 DM Rotterdam, The Netherlands; Erasmus MC, University Medical Center Rotterdam,
P.O. Box 2040, 3000 CA Rotterdam, The Netherlands. Electronic address: Tony.vanRooij@UGent.be.
[2
]
iMinds-MICT-Ghent University, Department of Communication Sciences, Korte meer 7-9-11,
9000 Ghent, Belgium; IVO Addiction Research Institute Rotterdam, Heemraadssingel 194,
3021 DM Rotterdam, The Netherlands; NIVEL, Netherlands Institute for Health Services
Research, P.O. box 1568, 3500 BN Utrecht, The Netherlands.
[3
]
iMinds-MICT-Ghent University, Department of Communication Sciences, Korte meer 7-9-11,
9000 Ghent, Belgium; IVO Addiction Research Institute Rotterdam, Heemraadssingel 194,
3021 DM Rotterdam, The Netherlands; Maastricht University, Department of Health Promotion,
P.O. Box 616, 6200 MD Maastricht, The Netherlands.