Defining the concept of mental dysregulation in patients requiring ambulance and/or emergency department care: protocol for a Delphi consensus study

G. Van de Glind, J. Crilly, N. Galenkamp, B. Schut, L. Werner, E. Chan, E. Hilton, L. Schoonhoven, F. E. Scheepers, R. Muir, D. Baden, M. van Veen and W. H. W. Ham