I work together with many wonderful researchers around the world.

On Contextualizing Health Behavior

Prof.dr. Stan Maes (Leiden University/Free University Brussels), who sadly passed away in December 2018

Prof.dr,. Falko Sniehotta (Newcastle University)

 Dr. Justin Presseau (Ottowa Hospital Research Unit)

 Dr. Michelle Segar (University of Michigan)

 Prof.dr. Arie Dijkstra (Groningen University)

Prof.dr. Ingrid Steenhuis (Free University of Amsterdam)

 Prof.dr. John de Wit (Utrecht University)

Prof.dr. Emely de Vet (Wageningen University)

Dr. Janice Sandjojo (Leiden University)

 Laura Kunst, MSc. (Tilburg University)

– and in relation to Pain

 Dr. Emma Massey (Erasmus Medical Centre)

 Dr. Nadia Garnefski (Leiden University)

Prof.dr. Geert Crombez (Gent University)

 Dr. Liesbet Goubert (Gent University)

On Identity Processes in Behavioral Change

Dr. Eline Meijer, (Leiden University Medical Center)

Kristell Penfornis, MSc (Leiden University)

Dr. Hanneke Hendriks (Amsterdam University)

Prof.dr. Colette van Laar (University of Leuven)

Prof.dr. Bas van der Putte (University of Amsterdam/Trimbos Institute)

Prof.dr. Marc Willemse (Maastricht University/National Alliance The Netherlands Smoke Free)

Prof.dr. Jessica Kiefte (Leiden University Medical Center)

 Michelle Brust, MSc. (Leiden University Medical Center)

Prof.dr. Robert West (University College London)

Prof.dr. Paul Norman (Sheffield University)

 On Implementation Theory

Dr. Yvette Meuleman (Leiden University Medical Center)

Dr. Josanne Huijg (Leyden Academy on Vitality and Ageing)

Dr. Matty Crone (Leiden University Medical Centre)

Prof.dr. Barend Middelkoop (Leiden University Medical Centre)